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Microbiology & Immunology USMLE Step 1 First Aid
Bacteria, Viruses, Parasites, Fungi, Immune Syst
785
Medical
Graduate
05/10/2011

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Term
(T/F) The outer membrane
for G+ and the cell
membrane for G- act as
major surface antigens.
Definition
FALSE: they DO act a major
surface antigens BUT the
outer mb for G- and the cell
membrane for G+
Term
Are endotoxins heat stable?
Definition
yes, stable at 100C for 1 hr.
Term
Are endotoxins secreted from
cells?
Definition
No
Term
Are endotoxins used as
antigens in vaccines?
Definition
no, they don't produce
protective immune response
Term
Are exotoxins heat stable?
Definition
no, destroyed rapidly at 60C
(exception: Staphylococcal
enterotoxin)
Term
Are exotoxins secreted from
cells?
Definition
Yes
Term
Are exotoxins used as
antigens in vaccines?
Definition
Yes, TOXOIDS are used as
vaccines
Term
Describe the chemical
composition of
peptidoglycan.
Definition
Sugar backbone with crosslinked
peptide side chains.
Term
Describe the major
components of a G- cell wall.
Definition
inner and outer lipid bilayer
membranes - thin layer of
peptidoglycan - periplasmic
space - contains
lipopolysaccharide,
lipoprotein and phospholipid
Term
Describe the major
components of a G+ cell wall.
Definition
one lipid bilayer membrane -
thick layer of peptidoglycan -
contains teichoic acid.
Term
Describe the process of
conjugation.
Definition
DNA transfer from one
bacterium to another.
Term
Describe the process of
transduction.
Definition
DNA transfer by a virus from
one cell to another
Term
Describe the process of
transformation.
Definition
purified DNA is taken up by a
cell
Term
Does endotoxin induce and
antigenic response?
Definition
no,not well
Term
Does exotoxin induce and
antigenic response?
Definition
Yes, induces high-titer
antibodies called antitoxins
Term
Give two general functions of
peptidoglycan
Definition
Gives rigid support - protects
against osmotic pressure
Term
How are Group A and Group B
Strep primarily differentiated?
Definition
Group A are Bacitracin
sensitive - Group B are
Bacitracin resistant
Term
How are the pathogenic
Neisseria species
differentiated?
Definition
on the basis of sugar
fermentation
Term
How are the species of
Streptococcus primarily
differentiated?
Definition
on the basis of their
HEMOLYTIC capabilities
Term
List the four phases of the
bacterial growth curve.
Definition
Lag phase - log (exponential)
phase - stationary phase -
death phase
Term
Name 2 G- rods that are
considered slow lactose
fermenters.
Definition
Citrobacter and Serratia
Term
Name 3 G- rods that are
considered fast lactose
fermenters.
Definition
1) Klebsiella 2) E. coli 3)
Enterobacter
Term
Name 3 G- rods which are
lactose nonfermenters and
Oxidase(-)?
Definition
Shigella, Salmonella, Proteus
Term
Name 4 bacteria that use IgA
protease to colonize mucosal
surfaces.
Definition
1) Strep. pneumoniae 2)
Neisseria meningitidis 3)
Neisseria gonorrhea 4) H. flu
Term
Name 4 genus of bacteria
that are G- 'coccoid' rods.
Definition
1) H. flu 2) Pasteruella 3)
Brucella 4) Bordetella
pertussis
Term
Name 6 bacteria that don't
Gram's stain well?
Definition
Treponema - Rickettsia -
Mycobacteria - Mycoplasma
- Legionella pneumophila -
Chlamydia
Term
Name four genus of bacteria
that are G+ rods.
Definition
1) Clostridium (an anaerobe)
2) Coynebacterium 3) Listeria
4) Bacillus
Term
Name seven G+ bacteria
species that make exotoxins.
Definition
1) Corynebacterium
diphtheriae 2) Clostridium
tetani 3) Clostridium
botulinum 4) Clostridium
perfringens 5) Bacillus
anthracis 6) Staph. aureus 7)
Strep. pyogenes
Term
Name three diseases caused
by exotoxins.
Definition
Tetanus - botulism -
diptheria
Term
Name three G- bacteria
species that make exotoxins.
Definition
1) E. coli 2) Vibrio cholerae
3) Bordetella pertussis
Term
Name three Lactose fermenting
enterics.
Definition
Eschericia, Klebsiella,
Enterobacter
Term
Name two diseases caused by
endotoxins.
Definition
Meningococcemia - sepsis by
G(-) rods
Term
Name two type of Strep that
exhibit alpha hemolysis?
Definition
S. pneumoniae - Viridans
strep. (e.g. S. mutans)
Term
Name two types of Strep. that
are non-hemolytic (gamma
hemolysis).
Definition
Enterococcus (E. faecalis) and
Peptostreptococcus
(anaerobe)
Term
Name two types of Strep. that
exhibit beta hemolysis.
Definition
Group A Strep. (GAS) and
Group B Strep. (GBS)
Term
Teichoic acid induces what
two cytokines?
Definition
TNF and IL-1
Term
What are the effects of
erythrogenic toxin?
Definition
it is a superantigen - it
causes rash of Scarlet fever
Term
What are the effects of
streptolysin O ?
Definition
it is a hemolysin - it is the
antigen for ASO-antibody
found in rheumatic fever
Term
What are the effects of the
exotoxin secreted by Bacillus
anthracis? (1)
Definition
one toxin in the toxin
complex is an adenylate
cyclase
Term
What are the effects of the
exotoxin secreted by
Bordetella pertussis? (3)
Definition
Stimulates adenylate cyclase
by ADP ribosylation - causes
whooping cough - inhibits
chemokine receptor, causing
lymphocytosis
Term
What are the effects of the
exotoxin secreted by
Clostridium botulinum?
Definition
blocks release of
acetylcholine: causes
anticholenergic symptoms,
CNS paralysis; can cause
'floppy baby'
Term
What are the effects of the
exotoxin secreted by
Clostridium perfringens?
Definition
alpha toxin is a lecithinase -
causes gas gangrene - get a
double zone of hemolysis on
blood agar
Term
What are the effects of the
exotoxin secreted by
Clostridium tetani?
Definition
blocks release of the
inhibitory NT glycine; causes
'lockjaw'
Term
What are the effects of the
exotoxin secreted by
Corynebacterium diphtheria?(3)
Definition
1) inactivates EF-2 by ADP
ribosylation 2) pharyngitis 3)
'pseudomembrane' in throat
Term
What are the effects of the
exotoxin secreted by E. coli?
(2)
Definition
this heat labile toxin
stimulates adenylate cyclase
by ADP ribosylation of G
protein - causes watery
diarrhea
Term
What are the effects of the
exotoxin secreted by Staph.
aureus?
Definition
superantigen; induces IL-1
and IL-2 synthesis in Toxic
Shock Syndrome; also causes
food poisoning
Term
What are the effects of the
exotoxin secreted by Vibro
cholerae? (3)
Definition
Stimulates adenylate cyclase
by ADP ribosylation of G
protein - increases pumping
of Cl- and H2O into gut -
causes voluminous rice-water
diarrhea
Term
What are the general clinical
effects of endotoxin?(2)
Definition
fever, shock
Term
What are three primary/
general effects of endotoxin
(especially lipid A)?
Definition
1) Acivates macrophages 2)
Activates completment (alt.
pathway) 3) Activates
Hageman factor
Term
What are two exotoxins
secreted by Strep. pyogenes?
Definition
Erythrogenic toxin and
streptolysin O
Term
What are two functions of the
pilus/fimbrae?
Definition
Mediate adherence of bacteria
to the cell surface - sex pilus
forms attachment b/t 2
bacteria during conjugation
Term
What are two species of Gram
(-) cocci and how are they
differentiated?
Definition
1) Neisseria memingitidis:
maltose fermenter 2)
Neisseria gonorrhoeae:
maltose NONfementer
Term
What bacteria produces a
blue-green pigment?
Definition
Pseudomonas aeruginosa
Term
What bacteria produces a red
pigment?
Definition
Serratia marcescens
('maraschino cherries are red')
Term
What bacteria produces a
yellow pigment?
Definition
Staph. aureus (Aureus= gold
in Latin)
Term
What culture requirements do
Fungi have?
Definition
Sabouraud's agar
Term
What culture requirements do
Lactose-fermenting enterics
have?
Definition
MacConkey's agar (make pink
colonies)
Term
What culture requirements
does B. pertussis have?
Definition
Bordet-Gengou (potato) agar
Term
What culture requirements
does C. diphtheriae have?
Definition
Tellurite agar
Term
What culture requirements
does H. flu have?
Definition
chocolate agar with factors V
(NAD) and X (hematin)
Term
What culture requirements
does Legionella pneumophia
have?
Definition
Charcol yeast extract agar
buffered with increased iron
and cysteine
Term
What culture requirements
does N. gonorrhea have?
Definition
Thayer-Martin (VCN) media
Term
What G- rod is a lactose
nonfermenter and is Oxidase
+ ?
Definition
Pseudomonas
Term
What is a function of the
plasma membrane in
bacterial cells.
Definition
site of oxidative and
transport enzymes
Term
What is a toxoid?
Definition
exotoxin treated with
formaldehyde (or acid or
heat); retains antigeniciy but
looses toxicity
Term
What is an acronym for
remembering 6 bacteria that
don't Gram's stain well?
Definition
TRMMLC: These Rascals May
Microscopically Lack Color
Term
What is meant by alpha, beta,
and gamma hemolysis?
Definition
On a Blood agar plate:
alpha= complete; clear -
beta= partial; green -
gamma= no hemolysis; red
Term
What is the chemical
composition of a glycocalix?
Definition
polysaccharide
Term
What is the chemical
composition of bacterial
ribosomes?
Definition
RNA and protein in 30S and
50S subunits
Term
What is the chemical
composition of endotoxin?
Definition
Lipopolysaccharide
Term
What is the chemical
composition of exotoxin?
Definition
polypeptide
Term
What is the chemical
composition of spores?
Definition
keratin-like coat - dipicolinic
acid
Term
What is the funciton and
chemical composition of the
flagellum?
Definition
for motility - made of protein
Term
What is the function of a
glycocalix?
Definition
mediates adherence to
surfaces, especially foreign
surfaces (i.e. catheters)
Term
What is the function of
spores?
Definition
provides resistance to
dehydration, heat, and
chemicals
Term
What is the major chemical
composition of the capsule?
Definition
Polysaccharide (*except
Bacillus anthracis, which
contains D-Glutamate)
Term
What is the major function of
the capsule?
Definition
antiphagocytic
Term
What is the mode of action of
endotoxin?
Definition
includes TNF and IL-1
Term
What is the nature of the DNA
transferred in conjugation?
Definition
Chromosomal or plasmid
Term
What is the nature of the DNA
transferred in transduction?
Definition
Any gene in generalized
transduction; only certain
genes in specialized
transduction
Term
What is the nature of the DNA
transferred in transformation?
Definition
any DNA
Term
What is the periplasm? Where
is it found?
Definition
the space between the inner
and outer cell membranes
found in G(-) bacteria.
Term
What is the primary test to
subcatergorize G- rods?
Definition
are they Lactose Fermenters?
Term
What is the source of
endotoxins?
Definition
cell wall of most G- bacteria
(think N-dotoxin=gram
Negative)
Term
What is the source of
exotoxins?
Definition
certain species of some G+
and G- bacteria
Term
What is the unique chemical
component of Gram (-) cell
membranes?
Definition
Lipopolysaccharide
Term
What is the unique chemical
component of Gram + cell
membranes?
Definition
teichoic acid
Term
What is used to stain
Legionella?
Definition
silver stain
Term
What species is Group A
Strep?
Definition
S.pyogenes
Term
What species is Group B
Strep?
Definition
S. agalactiae
Term
What stain is amyloid and
gives an apple-green
birefringence in polarized
light?
Definition
congo red
Term
What stain is used for acid
fast bacteria?
Definition
Ziehl Neelsen
Term
What stain is used for
Borrelia, Plasmodium,
trypanosomes, and
Chlamydia?
Definition
Giemsa's
Term
What stain is used for
Cryptococcus neoformans?
Definition
India ink
Term
What stains gylcogen,
mucopolysaccharides and is
used to diagnose Whipple's
disease?
Definition
PAS(periodic acid schiff)
Term
What test distinguishes Staph.
and Strep?
Definition
Staph. are Catalase (+) and
are in clusters - Strep. are
Catalase (-) and are in chains
Term
What test distinguishes Staph.
aureus from Staph.
epidermidis and Staph.
saprophyticus?
Definition
S. aureus is Coagulase (+) -
S. epidermidis and S.
saprophyticus are Coagulase(-)
Term
What two things distinguish
S. pneumoniae from Viridans
Strep.?
Definition
S. pneumoniae: have Capsule;
Optochin Sensitive - Viridans
strep: No capsule; Optochin
Resistant
Term
What type of enzymes allows
certain bacteria to colonize
mucosal surfaces?
Definition
IgA proteases
Term
When endotoxin activates
complement, what are the
secondary effects?
Definition
C3a: hypotension, edema -
C5a: neutrophil chemotaxis
Term
When endotoxin activates
Hageman, what are the
secondary effects?
Definition
coagulation cascade: DIC
Term
When endotoxin activates
macrophages, what 3
cytokines are released and
what are the secondary
effects?
Definition
IL-1--fever - TNF--fever,
hemmoragic tissue necrosis
- Nitic oxide--hypotension,
shock
Term
Where are the genes for
endotoxin located?
Definition
on the bacterial chromosome
Term
Where are the genes for
exotoxin located?
Definition
on a plasmid or in a
bacteriophage
Term
Where are the spores of
Clostridium botulinum found?
Definition
canned food - honey
Term
Where is LPS found?
Definition
in the outer membrane of G
(-) cell walls
Term
Which has a higher toxicity:
exotoxin or endotoxin?
Definition
EXOTOXIN: fatal dose is ~1ug!
(for endotoxin, fatal dose is
hundreds of micrograms)
Term
Which type of Neisseria
ferment Glucose only?
Definition
Gonococci (Glucose=
Gonococci)
Term
Which type of Neisseria
ferment maltose and glucose?
Definition
Meningococci
(MaltoseGlucose=
MeninGococci)
Term
Which types of transfer can
eukaryotic cells do?
Definition
only transformation
Term
Which types of transfer can
prokaryotic cells do?
Definition
all 3: conjugation,
transduction, and
transformation
Term
Why don't Mycobacteria
Gram's stain well?
Definition
high lipid content cell wall
requires acid-fast stain
Term
Why don't Mycoplasma
Gram's stain well?
Definition
no cell wall
Term
Why don't Rickettsia,
Chlamydia, and Legionella
Gram's stain well?
Definition
they are intracellular
(Legionella is Mainly
intracellular)
Term
Why don't Treponema Gram's
stain well?
Definition
too thin to be visualized (use
darkfield microscopy and
antibody staining)
Term
Name 5 species of bacteria
that are transmitted to
humans from animals.
(Acronym: BBugs From Your
Pet.)
Definition
Borrelia burgdorferi -
Brucella spp. - Francisella
tularensis - Yersinia pestis -
Pasteurella multocida
Term
All Rickettsiae (except one
genus) are transmitted by
what type of vector?
Definition
arthropod (Coxiella is
atypical: transmitted by
aeresol)
Term
Are G(-) bugs resistant to Pen
G? to ampicillin? to
vancomycin?
Definition
G- bugs are resistant to PenG
but may be susceptible to
pen. derivative like ampicillin.
The G- outer mb inhibits
entry of PenG and vancomycin
Term
Are Strep. pneumoniae
sensitve to optochin? Are
Viridans strep.?
Definition
Strep. pneumoniae is
optochin-Sensitive - Viridans
streptococci is optochin-
Resistant
Term
Are Strep. pyogenes
Bacitracin-sensitive?>
Definition
YES. both are catalase +
Term
Are Viridans strep. alpha,
beta, or non-hemolytic?
Definition
alpha
Term
Because of drug resistance,
what in an alternate
treatment combination for
leprosy?
Definition
rifampin with dapsone and
clofazimine
Term
Besides the rash, what other
body systems are affected by
Lyme disease? (3)
Definition
joints -CNS -heart
Term
Describe lab-findings for
Pseudomonas aeruginosa.
Definition
Aerobic, G(-) rod. - Nonlactose
fermenting - Oxidase
positive - Produces
pyocyanin (blue-green
pigment)
Term
Describe the disease
associated with M. aviumintracellulare.
Definition
often resistant to multiple
drugs; causes disseminated
disease in AIDS.
Term
Describe the H. flu vaccine.
When is it given?
Definition
contains type b capsulare
polysaccharide conjugated to
diphtheria toxoid or other
protein. -Given b/t 2m and
18m.
Term
Describe the typical findings
with diarrhea caused by
enterotoxigenic E. coli. (3)
Definition
1) Ferments lactose 2) watery
diarrhea 3) no fever/
leukocytosis
Term
Describe the typical findings
with Vibro cholerae. (3)
Definition
1) Comma-shaped organisms
2) rice-water stools 3) no
fever/leukocytosis
Term
Do Streptococcus pneumonia
have catalase? Do Viridans
Strep. have catalase?
Definition
YES. both are catalase +
Term
Enterococci are hardier than
nonenterococcal group D
bacteria. What lab conditions
can they grow in?
Definition
6.5% NaCl (used as lab test)
Term
Following primary infection
with TB, if preallergic
lymphatic or hematogenous
dissemination occurs, what
follows?
Definition
-dormant tubercle bacilli
form in several organs -
REACTIVATION can occur in
adult life
Term
Following primary infection
with TB, if severe bacteremia
occurs, what follows?
Definition
Miliary tuberculosis and
possibly death
Term
Following primary infection
with TB, if the lesion heals by
fibrosis, what is the result?
Definition
Immunity and
hypersensitivity--->
tuberculin positive
Term
Following primary infection
with TB, under what
conditions would the lesion
likely progress to lung
disease?
Definition
HIV, malnutrition. This
progressive lung disease can
rarely lead to death.
Term
Following primary infection
with TB, what are 4 possible
courses the disease could
take?
Definition
1) Heals by fibrosis 2)
Progressive lung disease 3)
Severe bacteremia 4)
Preallergic lymphatic or
hematogenous dissemination
Term
Give 3 examples of obligate
anaerobes.
Definition
Clostridium - Bacteroides -
Actinomyces
Term
Give 3 types of infection
Pseudomonas aeruginosa is
commonly responsible for.
Definition
1) burn wound infection 2)
nosocomial pneumonia 3)
pneumonia with cystic
fibrosis
Term
Give 4 examples of
encapsulated bacteria.
Definition
1) Strep. pneumoniae 2)
Haemophilus influenza
(especially b) 3) Neisseria
memingitidis 4) Klebsiella
pneumoniae
Term
H. flu causes what? (4)
Definition
Epiglottitis -Meningitis -
Otitis media -Pneumonia
(haEMOPhilus)
Term
How are Borrelia visualized?
Definition
using aniline dyes (Wright's or
Giemsa stain) in light
microscopy
Term
How are Mycobacteria
visualized in the lab?
Definition
acid-fast stain =Ziehl-
Neelson
Term
How are Treponema
visualized?
Definition
by dark-field microscopy
Term
How can secondary
tuberculosis in the lung
occur?(2)
Definition
1) Reinfection of partially
immune hypersensitized hosts
(usu. adults) =exogenous
source 2) Reactivation of
dormant tubercle bacilli in
immunocompromised or
debilitated hosts
=endogenous source
Term
How can you remember that
Viridans strep are resistant to
optochin?
Definition
they live in the mouth and are
not afraid of the (opto-)CHIN
Term
How does primary syphilis
present?
Definition
with a painless chancre
(localized disease; 2-10 wks).
Term
How does secondary syphilis
present?
Definition
disseminated disease (1-3m
later) with constitutional
symptoms, maculopapular
rash, condylomata lata
(genital lesions)
Term
How does tertiary syphilis
present?
Definition
gummas (granulomas),
aortitis, neurosyphilis (tabes
dorsalis), Argyll-Robertson
pupil
Term
How does the bacterium
cause the disease?
Definition
via exotoxin encoded by
beta-prophage; exotoxin
inhibits protein synthesis via
ADP-ribosylation of EF-2
Term
How does the rash with
typhus differ from the rash
with RMSF?
Definition
typhus: maculopapillary rash
BEGINS ON TRUNCK, moves
peripherally -RMSF: macules
progressing to petichiae
BEGIN ON HANDS &FFET
and move inward.
Term
How is Brucellosis/Undulant
fever transmitted?
Definition
dairy products, contact with
animals
Term
How is Cellulitis transmitted?
Definition
Animal bite; cats, dogs
Term
How is H. flu transmitted?
Definition
aeresol
Term
How is Legionnaires' disease
diagnosed in lab?
Definition
use silver stain (doesn't Gram
stain well) -culture with
charcoal yeast extract with
iron and cysteine
Term
How is Legionnaires' disease
transmitted?
Definition
aeresol transmission from
envirnomental water source
habitat (NO human-to human
transmission).
Term
How is Lyme disease
transmitted?
Definition
Tick bite; Ixodes ticks that
live of deer and mice
Term
How is Shigella spread?
Definition
food, fingers, feces, and flies'
Term
How is the Plague
transmitted?
Definition
Flea bite; rodents, especially
prairie dogs
Term
How is Tuleremia
transmitted?
Definition
Tick bite; rabbits, deer
Term
Is Bacillus anthracis G+ or
G-? What is its morphology?
Definition
It is a G+, spore-forming rod
Term
Is there an animal reservoir
for leprosy?
Definition
Yes, armadillos in the US
Term
List 5 findings associated
with rheumatic fever. (Hint:
PECCS)
Definition
Polyarthritis - Erythema
marginatum -Chorea -
Carditis - Subcutaneous
nodules
Term
List the 'ABCDEFG' of
diphtheria.
Definition
ADP ribosylation -Betaprophage
-Corynebacterium
- Diphtheria - Elongation
Factor 2 - Granules
Term
Name 2 alpha-hemolytic
bacteria.
Definition
Strep. pneumoniae - Viridans
streptococci
Term
Name 2 bugs that cause
diarrhea but NOT fever and
leukocytosis?
Definition
E. coli and Vibro cholerae
Term
Name 2 disease processes
that can be caused by
enterococci.
Definition
1) UTI 2) subacute
endocarditis
Term
Name 2 species of
enterococci.
Definition
Enterococcus faecalis -
Enterococcus faecium
Term
Name 2 symptoms of
diphtheria.
Definition
pseudomembraneous
pharyngitis (grayish white
membrane) -
lymphadenopathy
Term
Name 3 spore forming
bacteria.
Definition
Bacillus anthracis -
Clostridium perfringens - C.
tetani
Term
Name 4 beta-hemolytic
bacteria.
Definition
1) Staph. aureus 2) Strep.
pyogenes (GAS) 3) Strep.
agalactiae (GBS) 4) Listeria
monocytogenes
Term
Name 4 lactose-fermenting
enteric bacteria.
Definition
Klebsiella -E. coli -
Enterobacter Citrobacter
(think Lactose is KEE for first
three listed)
Term
Name 4 obligate aerobic
bacteria.
Definition
Norcardia - Pserudomonas
aeruginosa - Mycobacterium
tuberculosis - Bacillus
Term
Name 5 bugs that cause
watery diarrhea.
Definition
1) Vibrio cholerae 2)
enterotoxigenic E. coli 3)
viruses (rotavirus) 4)
protozoa (Cryptosporidium)
and (5) Giardia
Term
Name 6 bugs that cause
bloody diarrhea.
Definition
1) Salmonella 2) Shigella 3)
Campylobacter jejuni 4)
enterohemorrhagic/
enteroinvasive E.coli 5)
Yersinia enterocilitica 6)
Entamoeba histolytica (a
protozoan)
Term
Name 7 faculatative
intracellular bacteria.
Definition
1) Mycobacterium 2) Brucella
3) Francisella 4) Listeria 5)
Yersinia 6) Legionella 7)
Salmonella
Term
Name three genera of
spirochetes.
Definition
Borrelia (big size) -
Leptospira -Treponema
(think: BLT; B is big)
Term
Name two lab tests used to
detect syphilis?
Definition
VDRL and FTA-ABS
Term
Name two non-lactose
fermenting bacteria that
invade intestinal mucosa and
can cause bloody diarrhea.
Definition
Salmonella and Shigella
Term
Name two obligate
intracellular bacteria.
Definition
Rickettsia and Chlamydia
(Hint: 'stay inside when its
Really Cold.')
Term
RMSF is endemic to what part
of the US?
Definition
the East Coast (in spite of the
name)
Term
Spore are formed by certain
species of what type of
bacteria?
Definition
Gram+ rods, usually in soil;
form spores only when
nutrients are limited
Term
T/F Chlamydia are obligate
intracellular parasites that
cause mucosal infections.
Definition
true
Term
T/F Chlamys means cloak.
Definition
true (intracellular)
Term
T/F Enterobacteriaceae are
oxidase negative and are
glucose fermenters.
Definition
True
Term
T/F H. pylori infection is a
risk factor for peptic ulcer
and gastric carcinoma.
Definition
True
Term
T/F Penicillin is not an
effective treatment against
Mycoplasma pneumoniae.
Definition
TRUE Mycoplama are
naturally resistant b/c they
have no cell wall.
Term
T/F Pseudomonas produces
both endotoxin and exotoxin.
Definition
TRUE: endotoxin--->
fever, shock -exotoxin---
> inactivates EF-2
Term
T/F Rickettsiae are obligate
intracellular parasites and
need CoA and NAD.
Definition
True
Term
T/F Some enterococci are
resistant to PenG.
Definition
FALSE: ALL enterococci are
naturally resistant to Pen/
cephlosporins.
Term
T/F Spores have no metabolic
activity.
Definition
True
Term
T/F: S. aureus food
poisoning is due to the
ingestion of bacteria that
rapidly secrete toxin once
they enter the GI tract.
Definition
FALSE: rapid onset of S.
aureus food poisoning is due
to injestion of PREFORMED
toxin
Term
The Weil-Felix reaction
usually tests positive for what
two diseases? Negative for
what? Cross reacts with what?
Definition
Positive: typhus and RMSF -
Negative: Q fever -Crossreacts:
with Proteus antigen
Term
Think COFFEe for
Enterobacteriaceae. What
does that stand for?
Definition
Capsular -O-antigen -
Flagellar antigen -Ferment
glucose -Enterobacteriaceae
Term
What's a pneumonic for
remembering 4 obligate
aerobes?
Definition
Nagging Pests Must Breath
(=Norcardia - Pserudomonas
aeruginosa - Mycobacterium
tuberculosis - Bacillus
Term
What (6) infections can
Pseudomonas aeruginosa
cause?
Definition
burn-wound infections -
Pneumonia (esp. in cystic
fibrosis) -Sepsis (black skin
lesions) -External Otitis
(swimmer's ear) - UTI -hot
tub folliculitis
Term
What 2 bugs can cause
bloody diarrhea, fever, and
leukocytosis, but do not
ferment lactose?
Definition
Salmonella and Shigella
Term
What animals carry Lyme
disease?
Definition
The Ixodes tick transmits it.
- Deer are required for tick
life cycle. - Mice are
important resservoirs.
Term
What anitbody class is
necessary for an immune
response to encapsulated
bacteria?
Definition
IgG2.
Term
What are 2 disease processes
caused by Viridans strep and
what species are responsible?
Definition
1) dental caries: Strep.
mutans 2) bacterial
endocarditis: Strep. sanguis
Term
What are 2 options for triple
thearpy treatment of H.
pylori?
Definition
(1) bismuth (Pepto-Bismal),
metronidazole, and
tetracyclin or amoxicillin. OR
(2) metronidazole,
omeprazole, and
clarithromycin (#2 is more
expensive)
Term
What are 3 advantages/
differences between VDRL
and FTA-ABS?
Definition
FTA-ABS is 1) more specific
2) positive earlier in disease
3) remains positive longer
than VDRL
Term
What are 3 disease processes
caused by Strep. pyogenes?
Definition
1) Pyogenic--pharyngitis,
cellulitis, skin infection 2)
Toxigenic--scarlet fever, TSS
3) Immunologic--rheumatic
fever, acute
glomerulonephritis
Term
What are 4 biological false
positives for VDRL?
Definition
1) Viruses (mono, hepatitis)
2) Drugs 3) Rheumatic fever
and rheumatic arthritis 4)
Lupus and leprosy (=VDRL)
Term
What are 4 clinical symptoms
of 'walking' pneumonia?
Definition
1) insidious onset 2)
headache 3) nonproductive
cough 4) diffuse interstitial
infiltrate
Term
What are 4 clinical symptoms
of TB?
Definition
1) fever 2) night sweats 3)
weight loss 4) hemoptysis
Term
What are 5 areas that can be
affected by extrapulmonary
TB?
Definition
1) CNS (parenchmal
tuberculoma or meningitis)
2) Vertebral body (Pott's
disease) 3) Lymphadenitis 4)
Renal 5) GI
Term
What are the culture
requirement for H. flu?
Definition
culture on chocolate agar
with factor V (NAD) and X
(hematin). [Think: 'Child has
'flu'; mom goes to five (V) and
dime (X) store to buy
chocolate.']
Term
What are the lab findings with
Chlamydia?
Definition
cytoplasmic inclusions on
Giemsa fluorescent antibodystains
smear
Term
What are the symptoms of
RMSF? (3)
Definition
1) rash on palms and soles
(migrating to wrists, ankles,
then trunck) 2) headache 3)
fever
Term
What are the three stages of
Lyme disease?
Definition
1) erythema chronicum
migrans, flu-like symptoms
2) neurologic and cardiac
manifestations 3)
autoimmune migratory
polyarthritis
Term
What are the two forms of
chlamydia?
Definition
1) Elementary body (small,
dense): Enters cell via
endocytosis 2) Initial or
Reticulate body: Replicates in
the cell by fission
Term
What are the two forms of
leprosy (or Hansen's disease)?
Definition
1) lepromatous- failed cellmediated
immunity, worse 2)
tuberculoid- self-limited.
Term
What are two drugs that could
be used to treat 'walking'
pneumonia?
Definition
tetracycline or erythromycin
Term
What are two drugs that could
treat Chlmydia?
Definition
erythromycin or tetracycline
Term
What are two lab findings
associated with 'walking'
pneumonia?
Definition
1) X-ray looks worse than
patient 2)High titer of cold
agglutinins (IgM)
Term
What are usually associated
with pseudomembraneous
colitis?
Definition
Clostridium difficile; it kills
enterocytes, usu. is
overgrowth secondary to
antibiotic use (esp.
clindamycin or ampicillin)
Term
What bacteria are G+, sporeforming,
anaerobic bacilli?
Definition
Clostridia
Term
What bacteria causes a
malignant pustule (painless
ulcer); black skin lesions that
are vesicular papules covered
by a black eschar?
Definition
Bacillus anthracis
Term
What bacteria exhibits a
'tumbling' motility, is found in
unpasteurized milk, and
causes meningitis in
newborns?
Definition
Listeria monocytogenes
Term
What bacteria is catalase(-)
and bacitracin-resistant?
Definition
Strep. agalactiae
Term
What bacteria is catalase(-)
and bacitracin-sensitive?
Definition
Strep. pyogenes
Term
What bacteria is catalase+
and coagulase+?
Definition
Staph. aureus
Term
What bacteria produces
alpha-toxin, a hemolytic
lecithinase that causes
myonecrosis or gas
gangrene?
Definition
Clostridium perfringens
Term
What bacterium causes
Cellulitis?
Definition
Pasteurella multocida
Term
What bacterium causes
leprosy?
Definition
Mycobacterium leprae
Term
What bacterium causes Lyme
disease?
Definition
Borrelia burgdorferi
Term
What bacterium causes the
Plague?
Definition
Yersinia pestis
Term
What bacterium causes
Tularemia?
Definition
Francisella tularensis
Term
What bacterium causes
Undulant fever?
Definition
Brucella spp. (a.k.a.
Brucellosis)
Term
What bug causes atypical
'walking' pneumonia?
Definition
Mycoplama pneumoniae
Term
What bug causes
gastroenteritis and up to 90%
of duodenal ulcers?
Definition
Helicobacter pylori
Term
What bug causes
Legionnaire's disease?
Definition
Legionella pneumophila
Term
What bug is associated with
burn wound infections?
Definition
Pseudomonas aeruginosa
Term
What bug is comma- or Sshaped
and grows at 42C,
and causes bloody diarrhea
with fever and leukocytosis?
Definition
Campylobacter jejuni
Term
What bug that causes
diarrhea is usually
transmitted from pet feces
(e.g. puppies)?
Definition
Yersinia enterocolitica
Term
What causes tetanus? (give
bacteria and disease process)
Definition
Clostridium tetani: exotoxin
produced blocks glycine
release (inhibitory NT) from
Renshaw cells in spinal cord
Term
What causes the flu?
Definition
NOT H. flu -it is caused by
influenza virus
Term
What chemical is found in the
core of spores?
Definition
dipicolinic acid
Term
What coccobacillus causes
vaginosis: greenish vaginal
discharge with a fishy smell;
nonpainful?
Definition
Gardnerella vaginalis
Term
What disease does Bordetella
perussis cause? How?
Definition
Whooping cough: toxin
permanently disables Gprotein
in respiratory mucosa
(turns the 'off' off);ciliated
epithelial cells are killed;
mucosal cells are overactive.
Term
What disease does Vibrio
cholerae cause? How?
Definition
Cholera: toxin permanently
activates G-protein in
intestinal mucosa (turns the
'on' on) causing rice-water
diarrhea
Term
What disease is caused by
Borrelia?
Definition
Lyme Disease
Term
What disease is caused by
Clostridium botulinum? What
pathophys. does it cause?
Definition
Botulism: associated with
contaminated canned food,
produces a preformed, heatlabile
toxin that inhibits ACh
release---> flaccid
paralysis.
Term
What diseases (2) are caused
by Treponema?
Definition
Syphilis (T. pallidum) -yaws
(T. pertenue; not and STD)
Term
What diseases can be caused
by Staph. aureus?
Definition
Inflammatory disease: skin
infections, organ abcess,
pneumonia - Toxin mediated
disease: Toxic
Shock Syn., scalded skin
syndrome (exfoliative toxin),
rapid onset food poisoning
(enterotoxins)
Term
What do Chlamydia
trachomatis serotypes A, B,
and C cause?
Definition
chronic infection, cause
blindness in Africa (ABC=
Africa / Blindness / Chronic
Term
What do Chlamydia
trachomatis serotypes D-K
cause? (3)
Definition
urethritis/ PID - neonatal
pneumonia -neonatal
conjuctivitis
Term
What do Chlamydia
trachomatis serotypes L1,L2,
and L3 cause?
Definition
lymphogranuloma venereum
(acute lymphadentis: positive
Frei test)
Term
What do RMSF, syphilis, and
coxsackievirus A infection
have in common?
Definition
rash on palm and sole is seen
in each (coxasackievirus A
=hand, foot, and mouth
disease)
Term
What does catalase do? Which
bacteria have it?
Definition
it degrades H2O2, an
antimicrobial product of
PMNs. - Staphlococci make
catalase; Strep. do NOT.
Term
What does the H-antigen
represent?
Definition
H: flagellar antigen, found on
motile species
Term
What does the K-antigen
represent?
Definition
K: capsular, relates to
virulence
Term
What does the O-antigen
represent?
Definition
O-antigen is the
polysaccharide of endotoxin
(found on all species)
Term
What does VDRL detect? (It
detects non-specific antibody
that reacts with what?)
Definition
detects antibody that reacts
with beef cardiolipin
Term
What drug of choice is used
to treat Norcardia?
Actinomyces? (Acronym:
SNAP)
Definition
Sulfa for Norcarida,
Actinomyces gets Penicillin
Term
What enteric bacterial
infection may be prolonged
with antibiotic treatment?
Definition
Salmonellosis
Term
What enzyme allows H. pylori
to creat an alkaline
environment?
Definition
urease (cleaves urea to
ammonia); used in urease
breath test
Term
What family includes E. coli,
Salmonella, Klebsiella,
Enterobacter, Serratia, and
Proteus?
Definition
Enterobacteriaceae
Term
What family of bacteria uses
the O-, K-, and H-antigen
nomenclature?
Definition
Enterobacteriaceae
Term
What function does the
capsule serve? (2: one for the
bacterium, one other)
Definition
1) antiphagocytic 2) antigen
in vaccines (Pneumovax, H.
flu b, meningococcal
vaccines)
Term
What G+ anaerobe causes
oral/facial abscesses with
'sulfur granules' that may
drain through sinus tracts in
skin?
Definition
Acinomyces israelii
Term
What G+ and also weakly acid
fast aorobe found in soil
causes pulmonary infections
in immunocompromised
patients?
Definition
Norcardia asteroides
Term
What general type of bacteria
are normal flora in GI tract
but pathogenic elsewhere?
Definition
Anaerobes
Term
What general type of bacteria
grow pink colonies on
MacConkey's agar?
Definition
Lactose-fermenting enteric
bacteria
Term
What is a Ghon complex and
in whom does it occur?
Definition
Occurs in Primary TB (usually
a child) -Ghon complex=
draining Hilar nodes and
Ghon focus, exudative
parenchymal lesion (usu. in
LOWER lobes of lung)
Term
What is a lab diagnosis of
diphtheria based on?
Definition
G+ rods with metachromatic
granules; grows on tellurite
agar. (Coryne=club shaped)
Term
What is a major difference
between Salmonella and
Shigella observable in the lab?
Definition
Salmonella are motile;
Shigella are nonmotile
Term
What is a positive Quellung
reaction?
Definition
if encapsulated bug is
present, capsule SWELLS
when specific anticapsular
antisera are added.
Term
What is notable about
Chrmydia psittaci?
Definition
has an avian reservoir
Term
What is one reason M. leparae
infects skin and superficial
nerves?
Definition
It likes cool temperatures
Term
What is the classic symptom
of Lyme disease?
Definition
erythema chronicum migrans,
an expanding 'bull's eys' red
rash with central clearing.
Term
What is the classic triad of
symptoms associated with
Rickettsiae?
Definition
1) headache 2) fever 3) rash
(vasiculitis)
Term
What is the common
manifestation of secondary
TB?
Definition
Fibrocaseous cavitary lesion
usu. in APICIES of lung
Term
What is the common site of
infection for Mycobacterium
tuberculosis?
Definition
the apicies of the lung (which
have the highest PO2)
Term
What is the D.O.C. to treat
Gardnerella vaginalis?
Definition
Metroidazole
Term
What is the DOC for treating
rickettsial infections?
Definition
tetracycline
Term
What is the DOC for
treatment of most rickettsial
infections?
Definition
Tetracycline
Term
What is the DOC to treat
Lyme Disease?
Definition
Tetracycline
Term
What is the DOC to treat
syphilis?
Definition
Penicillin G
Term
What is the drug of choice for
H. flu meningitis? What DOC
for prophylaxis in close contacts?
Definition
Treat meningitis with
CEFTRIAXONE; Rifampin for
prophylaxis.
Term
What is the drug of choice for
Legionaires' disease?
Definition
Erythromycin
Term
What is the morphology of H.
flu?
Definition
Small G(-) (coccobacillary) rod
Term
What is the morphology of H.
pylori?
Definition
Gram (-) rod
Term
What is the primary drug
used to treat leprosy?
Definition
dapsone (toxicity is hemolysis
and methemoglobinemia)
Term
What is the recommended
treatment for Pseudomonas
aeruginosa infection?
Definition
aminoglycoside plus
extended-spectrum penicillin
(e.g. piperacillin or ticarcillin)
Term
What is the source of
infection and the bacterium
that causes endemic typhus?
Definition
R. typhi; from fleas
Term
What is the source of
infection and the bacterium
that causes epidemic typhus?
Definition
R. prowazekii; from human
body louse
Term
What is the source of
infection and the bacterium
that causes Q fever?
Definition
Coxiella burnetii; from
inhaled aersols
Term
What is the source of
infection and the bacterium
that causes Rocky Mountain
Spotted Fever?
Definition
Rickettsia rickettsii; from tick
bite
Term
What is the toxin responsible
for TSS is Staph. aureus?
Definition
TSST-1; it is a superantigen
that binds to class II MHC and
T-cell receptors--->
polyclonal T-cell activation
Term
What is the unique
component found in
Mycoplamsa bacterial
membranes?
Definition
Cholesterol
Term
What is the unique feature of
Chlamydiae cell walls?
Definition
its peptidoglycan wall lacks
muramic acid
Term
What is woolsorter's disease?
Definition
inhalation anthrax; can cause
life-threatening pneumonia
Term
What lab test assays for
antirickettsial antibodies?
Definition
Weil-Felix reaction
Term
What Lancefield Antigen
Group are enterococci in?
Definition
Group D
Term
What Lancefield Antigen
Group are Viridans strep in?
Definition
They are non-typealbe. They
do not have a C-carbohydrate
on their cell wall to be
classified by.
Term
What level of disinfection is
required to kill spores?
Definition
autoclaving; they are highly
resistant to destruction by
heat and chemicals
Term
What populations are most
likely to get Mycoplama
pneumoniae infection?
Definition
patients younger than age 30
- military recruits - prisons
Term
What rickettsial disease is
atypical in that it has no rash,
no vector, negative Weil-Felix
reaction, and its causative
organism can survive outside
for a long time?
Definition
Q fever (Coxiella burnetii)
Term
What species are associated
with food poisoning in
contaminated seafood?
Definition
Vibrio parahaemolytica and
Virbrio vulnificus
Term
What species causes
diphtheria?
Definition
Corynebacterium diptheriae
Term
What species is associated
with food poisoning in
improperly canned foods
(bulging cans)?
Definition
Clostridium botulinum
Term
What species is associated
with food poisoning in meats,
mayonnaise, and custard?
Definition
Staphylococcus aureus (this
food poisoining usu. starts
quickly and ends quickly)
Term
What species is associated
with food poisoning in
poultry, meat, and eggs?
Definition
Salmonella
Term
What species is associated
with food poisoning in
reheated meat dishes?
Definition
Clostridium perfringens
Term
What species is associated
with food poisoning in
reheated rice?
Definition
Bacillus cereus ('Food
poisoning from reheated rice?
Be serious!')
Term
What species is associated
with food poisoning in
undercooked meat and
unpasteurized juices?
Definition
E. coli 0157-H7
Term
What species of Mycobacteria
causes pulmonary, TB-like
symptoms?
Definition
M. kansasii
Term
What strain of Haemophilus
influenza causes most
invasive disease?
Definition
capsular type b
Term
What symptoms are
associated with M.
scrofulaceum
Definition
cervical lymphadenitis in kids
Term
What test differentiates
Viridans from S. pneumoniae?
Definition
Viridans are resistant to
optochin; S. pneu. are
sensitive to optochin
Term
What two bugs secrete
exotoxins that act via ADP
ribosylation of G-proteins,
permanently activating adenyl
cyclase (resulting in increased
cAMP)?
Definition
Vibrio cholerae - Bordetella
pertussis
Term
What two genera of G+ rods
form long branching
filaments resembling fungi?
Definition
Acinomyces and Nocardia
Term
What type of bacteria are
difficult to culture, produce
gas in tissue (CO2 and H2),
and are generally foulsmelling?
Definition
anaerobes
Term
What type of bacteria is
associated with rusty sputum,
sepsis in sickle cell, and
splenectomy?
Definition
Pneumococcus
Term
What type of E. coli are
associated with bloody
diarrhea?
Definition
enterohemmoragic/
enteroinvasive E. coli
Term
What type of immunologic
response is elicited by a
Salmonella infection?
Definition
monocyte response
Term
What types of infection can
chlamydia cause? (4)
Definition
arthritis-conjunctivitis -
pneumonia - nongonococcal
urethritis
Term
What virulence factor of
Staph. aureus binds Fc-IgG,
inhibiting complement
fixation and phagocytosis?
Definition
Protein A
Term
What virulence factor of
Strep. pyogenes also serves
as an antigen to which the
host makes antibodies?
Definition
M-protein
Term
What will likely be visible
under the microscope in the
case of Gardnerella vaginallis
infection?
Definition
Clue cell, or vaginal epithelial
cells covered with bacteria
Term
Where are Viridans strep.
found (reservoir)?
Definition
normal flora of oropharynx
Term
Where & when is Lyme
disease common?
Definition
common in northeast US in
summer months
Term
Which disease/toxin causes
lymphocytosis? (Cholera or
Pertussis)
Definition
Pertussis toxin: by inhibiting
chemokine receptors
Term
Which has an animal
reservoir? (Salmonella or
Shigella)
Definition
Salmonella: poultry, meat,
eggs
Term
Which is more specific for
syphilis: VDRL or FTA-ABS?
Definition
FTA-ABS is more specific
Term
Which is more virulent?
(Salmonella or Shigella)
Definition
Shigella (10^1 organisms vs.
Salmonella 10^5 organisms)
Term
Which is motile? (Salmonella
or Shigella)
Definition
Salmonella (think: salmon
swim)
Term
Which species of chlamydia
causes and atypical
pneumonia? How is it
transmitted?
Definition
C. pneumonia -transmitted
via aeresol
Term
Which two species of
chlamydia infect only
humans?
Definition
C. trachomatis -C.
pneumoniae
Term
Why are anaerobes
susceptible to oxygen?
Definition
they lack catalase and/or
oxidase and are susceptible
to oxidative damage
Term
Why does TB usually infect
the upper lobes of the lung?
Definition
M.tuberculosis is an aerobe;
there is more oxygen at the
apicies
Term
Why must rickettsia and
chlamydia always be
intracellular?
Definition
they can't make their own
ATP
Term
Are most fungal spores
asexual?
Definition
yes
Term
Are most P. Carinii infections
symptomatic?
Definition
no, most of are asymptomatic
Term
Are the above mentioned
systemic mycoses dimorphic?
Definition
yes, except coccioidomycosis
which is a spherule in tissue
Term
How do the S. Schenckii yeast
appear in the pus?
Definition
Cigar-shaped budding yeast
Term
How do you diagnose
cryptosporidium?
Definition
cysts on acid fast stain
Term
How do you diagnose
giardiasis?
Definition
Trophozoites or cysts in stool
Term
How do you get P. Carinii?
Definition
inhalation
Term
How do you treat systemic
mycoses?
Definition
fluconazole or ketoconazole
for local infection,
amphotericin B for systemic
infection
Term
How do you Tx S. Schenckii?
Definition
Itraconazole or Potassium
Iodide
Term
How does Aspergillus appear
microscopically?
Definition
Mold with septate hyphae
that branch at a V-shaped (45
degree angle) , they are NOT
dimorphic
Term
How does Mucor species
appear microscopically?
Definition
It is a mold with irregular
nonseptate hyphae branching
at wide angles>90 degrees
Term
How does
Paracocciodioidomycosis
appear histologically?
Definition
Captain's wheel' appearance
(like on a sailboat)
Term
How is Clonorchis sinensis
transmitted and what disease
results?
Definition
undercooked fish; causes
inflammation of the biliary
tract
Term
How is Schistosoma
transmitted and what disease
results?
Definition
snails are host; cercariae
penetrate skin of humans;
causes granulomas, fibrosis,
and inflammation of the
spleen and liver
Term
How is Ancylostoma
Duodenale transmitted and
what disease results?
Definition
Larvae penetrate skin of feet;
intestinal infection can cause
anemia
Term
How is Ascaris Lumbricoides
transmitted and what disease
results?
Definition
Eggs are visible in feces;
intestinal infection
Term
How is cryptosporidium
transmitted?
Definition
cysts in water
Term
How is Dracunculus
medinensis transmitted and
what disease results?
Definition
In drinking water; sink
inflammation and ulceration
Term
How is E. granulosis
transmitted and what disease
results?
Definition
Eggs in dog feces cause cysts
in liver; causes anaphylaxis if
echinococcal antigens
released from cysts
Term
How is E. Histolytica
transmitted?
Definition
Cysts in Water
Term
How is Enterobius
Vermicularis transmitted and
what disease results?
Definition
food contaminated with eggs;
intestinal infections; causes
anal pruritus
Term
How is giardia transmitted?
Definition
Cysts in Water
Term
How is Loa loa transmitted
and what disease results?
Definition
Transmitted by deer fly;
causes swelling the in the
skin (can see worm crawling
in conjunctiva)
Term
How is malaria dx?
Definition
Blood Smear
Term
How is malaria transmitted?
Definition
mosquito (Anopheles)
Term
How is Onchocerca volvulus
transmitted and what disease
results?
Definition
transmitted by female
blackflies; causes river
blindness
Term
How is Paragonimus
Westermani transmitted and
what disease results?
Definition
Undercooked crab meat;
causes inflammation and
secondary bacterial infection
of the lung
Term
How is Sporothrix schenckii
appear under the scope?
Definition
Dimorphic fugus that lives on
vegetation
Term
How is Strongyloides
Stercoralis transmitted and
what disease results?
Definition
larvae in soil penetrate the
skin; intestinal infection
Term
How is T. Canis transmitted
and what disease results?
Definition
food contaminated with eggs;
causes granulomas (if in
retina=blindness)
Term
How is T. Solium transmitted
and what disease results?
Definition
undercooked pork tapeworm;
causes mass lesions in the
brain, cysticercosis
Term
How is T. Vaginalis
transmitted?
Definition
Sexually
Term
How is Toxo transmitted?
Definition
cysts in meat or cat feces
Term
How is Trichinella Spiralis
transmitted and what disease
results?
Definition
undercooked meat, usually
pork; inflammation of muscle,
periorbital edema
Term
How is Wucheria transmitted
and what disease results?
Definition
female mosquito; causes
blockage of lymphatic vessels
(elephantiasis)
Term
In what cells do you find
histoplasmosis?
Definition
macrophages
Term
Is Pneumocystis Carinii a
yeast?
Definition
Yes, but originally classified
as a Protozoa
Term
Microscopically how does
Candida appear?
Definition
budding yeast with
pseudohyphae, germ tube
formation at 37 degrees C)
Term
Name 3 Trematodes (Flukes)
Definition
Schistosoma, Clonorchis
sinensis, Paragonimus
Westermani
Term
Name 4 opportunistic fungal
infections.
Definition
Candida Albicans, Aspergillus
fumigatus, Cryptococcus
Neoformans, Mucor and
Rhizopus species
Term
Name 4 systemic mycoses.
Definition
Coccidiomycosis,
Histoplasmosis,
Paracoccidioidomycosis,
Blastomycosis
Term
Name two asexual spores
transmitted by inhalation.
Definition
Hisoplasmosis and
Coccidiodomycosis
Term
Name two Cestodes
(Tapeworms) .
Definition
Taenia Solium, and
Echinococcus Ganulosus
Term
What agar is used to culture
for systemic mycoses?
Definition
Sabouraud's Agar
Term
What are Conidia?
Definition
asexual fungal spores (ex.
Blastoconidia, and
arthroconidia)
Term
what are most common Candida infections?
Definition
Thrush in Immunocompromised
pts (neonates, patients on
steroids, diabetics and AIDS
pts) , endocarditis in IV drug
users, vaginitis (high pH,
Diabetes, post-antibiotic) ,
diaper rash, disseminated
candidiasis (to any organ)
Term
What are some infections
caused by cryptococcus?
Definition
Cryptococcal meningitis,
cryptococcosis
Term
What are the 10 Nematodes
(roundworms) we are
concerned with?
Definition
Ancylostoma duodenale
(hookworm) , Ascaris
Lumbricoides, Enterobius
Vermicularis (pinworm) ,
Strongyloides stercoralis,
Trichinella Spiralis, Dracunculus
Medinensis, Loa loa, Onchocerca
Volvulus, Toxocara Canis,
Wucheria Bancrofti
Term
What are the 4 B's of
Blastomycosis?
Definition
Big, Broad-Based, Budding
Term
What are the diseases caused
by Cryptosporidium?
Definition
Severe diarrhea in AIDS, Mild
disease (watery diarrhea) in
non-HIV
Term
What are the diseases caused
by Toxoplasma?
Definition
Brain abscess in HIV and birth defects
Term
what are the infections caused by Aspergillus?
Definition
Ear fungus, Lung cavity
Aspergilloma ('fungus ball') ,
invasive aspergillosis.
Term
what can systemic mycoses mimic ?
Definition
TB (granuloma formation)
Term
What disease are caused by
Entamoeba Histolytica ?
Definition
Amebiasis: bloody diarrhea,
dysentery, liver abscess, RUQ
pain
Term
What disease does Mucor
species cause?
Definition
Mucormycoses
Term
What disease does
Pneumocystis carinii cause?
Definition
Pneumocystis Carinii pneumonia
Term
What disease does Sporothrix
Schenckii cause?
Definition
Sprotricosis
Term
What disease does
Trypanosoma Cruzi cause?
Definition
Chagas disease (heart dis)
Term
What disease is caused by
Giardia Lamblia?
Definition
Giardiasis: bloating,
flatulence, foul-smelling
diarrhea
Term
What disease is caused by
Leishmanina donovani?
Definition
Visceral Leishmaniasis (Kala azar)
Term
What disease is caused by P.
Carinii?
Definition
Diffuse interstitial pneumonia
in HIV
Term
What disease is caused by the
plasmodium species (vivax,
ovale, malariae, falciparum) ?
Definition
Malaria: cyclic fever,
headache, anemia,
splenomegaly
Term
What disease is caused by
Trypanosma Gambiense and
Rhodesiense?
Definition
African Sleeping sickness
Term
What disesase does
Trichomonas Vaginalis cause?
Definition
Vaginitis: foul-smeilling,
greenish discharge; itching
and burning
Term
What do you tx P. Carinii
with?
Definition
TMP-SMZ, or pentamidine, or
dapsone
Term
What do you use to culture
cryptococcus?
Definition
Asabouraud's Agar
Term
What do you use to Diagnose
E. Histolytica?
Definition
Serology and/or trophozoites
or cysts in stool
Term
What do you use to stain
Cryptococcus?
Definition
India Ink
Term
What do you use to tx
cryptosporidium?
Definition
Nothing
Term
What do you use to Tx
Giardiasis?
Definition
Metronidazole
Term
What do you use to tx T.
Vaginalis?
Definition
Metronidazole
Term
What do you used to dx P.
Carinii?
Definition
Lung biopsy or lavage,
methenamine silver stain
Term
What do you used to Tx
Candida Albicans?
Definition
Nystatin for superficial infections,Amphotercin B for systemic
Term
what does Alba mean?
Definition
white
Term
what does dimorphic mean?
Definition
fungi that are mold in the soil
(low temp) and yeast in tissue
(higher/body temp 37 C)
Term
What is diagnositic for L.
donovani?
Definition
macrophages containing amastigotes
Term
What is diagnositic of T.
Vaginalis?
Definition
Trophozoites on wet mount
Term
What is histoplasmosis
associated with?
Definition
bird or bat droppings
Term
What is the progression of S.
Schenckii infection?
Definition
traumatic introduction into
the skin, typically by a thorn
('rose gardner's' disease) ,
causes local pustule or ulcer
with nodules along draining
lymphatics (ascending
lymphangitis) . Little systemic
illness.
Term
what is the vector for L. Donovan?
Definition
sandfly
Term
what is the vector for T.Cruzi?
Definition
Reduviid bug
Term
What is the vector for T.
Gambiense and Rhodesiense?
Definition
Tsetse fly
Term
What is used to dx African
sleeping sickness?
Definition
blood smear
Term
What is used to dx T. Cruzii?
Definition
blood smear
Term
what is used to dx toxoplasma?
Definition
serology & biopsy
Term
What is used to treat D.
Medinensis?
Definition
Niridazole
Term
What is used to Treat E.
Histolytica?
Definition
metronidazole and iodoquinol
Term
What is used to tx african
sleeping sickness?
Definition
Suramin for bloodborne
disease or melaroprol for CNS
penetration
Term
What is used to tx
Ancylostoma duodenale?
Definition
mebendazole/pyrantel pamoate
Term
What is used to tx Ascaris
Lumbricoides?
Definition
mebendazole/pyrantel pamoate
Term
What is used to tx Clonorhis
sinensis?
Definition
praziquantel
Term
What is used to tx E.
Granulosus?
Definition
albendazole
Term
What is used to tx E.
Vermicularis?
Definition
Mebendazole/pyrantel
pamoate
Term
What is used to tx L.
Donovani?
Definition
Sodium Stibogluconate
Term
What is used to tx Loa loa?
Definition
diethylcarbamazine
Term
What is used to tx malaria?
Definition
Chloroquine ( primaquine for
vivax, ovale) , sulfadoxine +
pyrimethamine, mefloquine,
quinine
Term
What is used to tx O.
Volvulus?
Definition
Ivermectin
Term
What is used to tx
Paragonimus Wetermani?
Definition
Praziquantel
Term
What is used to tx S.
Stercoralis?
Definition
Ivermectin/thiabendazole
Term
What is used to tx
schistosoma?
Definition
Praziquantel
Term
What is used to tx T. Canis?
Definition
diethylcarbamazine
Term
What is used to tx T. Cruzii?
Definition
Nifurtimox
Term
What is used to tx T. Spiralis?
Definition
Thiabendazole
Term
What is used to tx taenia
solium infection?
Definition
Praziquantel/niclosamide;
albendazole for cysticercosis
Term
What is used to tx
toxoplasma?
Definition
sulfadiazine + pyrimethamine
Term
What is used to tx W.
Bancrofti?
Definition
diethylcarbamazine
Term
What patient population is
susceptible to Mucor disease?
Definition
Ketoacidotic patients and
Leukemic patients
Term
What stain do you use for
lung tissue when you are
detecting P. Carinii?
Definition
Silver
Term
What is used to tx
toxoplasma?
Definition
sulfadiazine + pyrimethamine
Term
What state predisposes you to
P. Carinii infection?
Definition
immunosuppression
Term
What test can be used to
detect polysaccharide
capsular antigen of
Cryptococcus?
Definition
latex agglutination test
Term
What types of infections can
Candida Albicans cause?
Definition
systemic or superficial fungal
infections
Term
When do you start
prophylaxis in HIV patients?
Definition
when the CD4 drops below
200 cells/mL
Term
Where do the mucor and
rhizopus species fungi
proliferate?
Definition
in the walls of blood vessels
and cause infarction of distal
tissue
Term
Where is Blastomycosis
endemic?
Definition
States east of the Mississippi
River and Central America
Term
Where is Coccidioidomycosis
endemic?
Definition
SWUS, California (San Joaquin
Valley or destert (desert
bumps) 'Valley fever')
Term
Where is Histoplasmosis
endemic?
Definition
Mississippi and Ohio River
valleys
Term
Where is
Paracoccioidomycosis
endemic?
Definition
Rural Latin America
Term
All viruses are haploid except
_________?(1)
Definition
Retroviruses, which have two
identical ssRNA molecules
(diploid).
Term
Bites from what 3 animals are
more prone to rabies
infection than a bite from a
dog?
Definition
Bat, Raccoon, and Skunk
Term
Define complementation?
Definition
When one of 2 viruses that
infects the cell has a mutation
that results in a nonfunctional
protein. The nonmutated
virus 'complements' the
mutated one by making a
functional protein that serves
both viruses.
Term
define genetic drift
Definition
Minor changes based on
random mutations.
Term
define genetic shift
Definition
Reassorment of viral genome
(such as when human flu A
virus recombines with swin
flu A virus.)
Term
define phenotypic mixing?
Definition
When virus A acquires virus B
coat proteins and acts like
virus B buts its progeny will
have virus A genome and
coat.
Term
define reassortment?
Definition
-When viruses with
segmented genomes (eg.
influenza virus) exchange
segments. -High frequency
recombination. Cause of
worldwide pandemics.
Term
define recombination?
Definition
Exchange of genes between 2
chromosomes by crossing
over within regions of
significant base sequence
homology.
Term
Describe its incubation period
and whether or not it has a carrier ?
Definition
-Short incubation period (3
weeks) -No carriers
Term
Describe its incubation period
and whether or not it has a
carrier.
Definition
-Long incubation (3 months)
- has carriers
Term
Describe the general concept
of bacterial super infection
which can occur with
influenza infection?
Definition
A life-threatening illness
where a bacterial infection is
superimposed on an existing
viral infection.
Term
Describe the genetic and
physical properties of
influenza virus?
Definition
-Enveloped -ssRNA virus with
segmented genome -prone to
genetic changes
Term
Describe the migration of
rabies within the CNS.
Definition
It migrates in a retrograde
fashion within the CNS up n.
axons.
Term
Describe the physical shape
and duration of incubation
for rabies.
Definition
-Bullet-shaped capsid (illus.
in book) -long incubation
period (wks. - 3 months)
Term
Describe the technique and
purpose for performing a
Tzanck test?
Definition
-assay for herpes -make a
smear of an opened skin
vesicle to detect
multinucleated giant cells
Term
Describe whether or not it
has a carrier.
Definition
has carriers
Term
Does HDV have carriers?
Definition
yes
Term
Explain the concept of a slow
virus infection.
Definition
Virus exists in patient for
months to years before it
manifests as clinical disease.
Term
From the following selection
which classes are considered
infectious and which aren't:
dsDNA, ds RNA, (-)ssRNA, (+)
ssRNA.
Definition
-Infectious: dsDNA (except
poxviruses and HBV) and (+)
ssRNA -Noninfectious:
dsRNA and (-)ssRNA
Term
HCV is a common form of
hepatitis in what US
population?
Definition
IV drug user
Term
How does a Monospot test
work?
Definition
It detects heterophil
antibodies by agglutination to
sheep RBC's
Term
How is RNA translated and
processed in picornaviruses?
Definition
RNA is translated into one
long polypeptide that is
cleaved by proteases into
many small proteins.
Term
How many segments and
what sense is the RNA
genome of influenza viruses?
Definition
-8 segments -negative sense
Term
How may serotypes do
paramyxoviruses have except
parainfluenza which has ___?
Definition
-1 -4
Term
Into what class RNA or DNA
to all segmented viruses fall?
Definition
RNA
Term
Killed vaccines induce what
type of immunity?
Definition
Humoral, with no possibility
of the virus reverting to
virulence
Term
Live attenuated vaccines
induce what type of
immunity?
Definition
Humoral and Cellular -with a
risk of the virus reverting to
virulence
Term
Mneumonic for rotavirus
symptoms: ROTA
Definition
right out the anus
Term
Mneumonic: Hep D
Definition
Defective, Dependent on HBV
Term
Mneumonic: Hep E:
Definition
Enteric, Expectant mothers,
Epidemics
Term
Mneumonic: Hep A:
Definition
Asymptomatic (usually)
Term
Mneumonic: Hep B:
Definition
Blood-borne
Term
Mneumonic: picoRNAvirus
Definition
pico = 'small' RNA viruses
Term
Name 2 common bacterial
infections in AIDS pts.
Definition
infections in AIDS pts.
TB, M. avium-intracellulare
complex
Term
Name 2 common protozoan
infections in AIDS pts.
Definition
Toxoplasmosis,
cryptosporidiosis
Term
Name 3 members of the
arborvirus family.
Definition
Flavivirus, Togavirus, and
Bunyavirus
Term
Name 3 possible sequelae of
measles infection?
Definition
-SSPE -encephalitis -giant
cell pneumonia (rare;found in
immunocompromised
persons)
Term
Name 4 common fungal
infections in AIDS pts.
Definition
-Thrush (Candida ablicans) -
cryptococcosis (cryptococcal
meningitis) -histoplasmosis -
Pneumocystis pneumonia
Term
Name 4 common viral
infections in AIDS pts.
Definition
-HSV -VZV -CMV -
progressive multifocal
leukoencephalopathy (JC
virus)
Term
Name 4 herpesviruses using
the mneumonic: Get herpes
in a CHEVrolet.
Definition
CMV-HSV_EBV-HZV
Term
Name 4 main segmented
viruses using the mneumonic
BOAR.
Definition
-Bunyaviruses -
Orthomyxoviruses (influenza
virus) -Arenaviruses -
Reoviruses
Term
Name eveloped DNA viruses
(3). HPH
Definition
hepadna- herpes-pox
Term
Name naked DNA viruses (3).
PAP
Definition
-Parvo -Adeno -Papova 'You
need to be naked for a PAP
smear.'
Term
Name the 3 naked RNA
viruses Naked CPR).
Definition
-Calcivivirus -Picornavirus -
Reovirus
Term
Name the characteristic
cytoplasmic inclusions seen
in neurons infected with
rabies.
Definition
Negri bodies
Term
Name the DNA enveloped
viruses (3).
Definition
-Herpesviruses (herpes
simplex virus types 1 and 2,
VZV, CMV, EBV) -HBV -
smallpox virus
Term
Name the DNA nucleocapsid
viruses (2).
Definition
Adenovirus, Papillomaviruses
Term
Name the DNA viruses using
the mneumonic 'HHAPPPy
viruses.'
Definition
-Hepadnavirus -
Herpesviruses -Adenovirus -
Parvovirus -Papovavirus -
Poxvirus
Term
Name the illness caused by
rabies and 2 primary
symptoms.
Definition
Encephalitis, fatal is not
prevented, with seizures and
hydrophobia
Term
Name the members of the
PaRaMyxovirus using the
letters in bold (4 viruses).
Definition
-Parainfluenza -RSV -Measles
-Mumps
Term
Name the recombinant
vaccine available (1).
Definition
HBV (antigen = recombinant
HBsAg)
Term
Name the RNA enveloped
viruses (9).
Definition
-Influenza viruses -
parainfluenza viruses -RSV -
measles -mumps -rubella -
rabies -HTLV -HIV
Term
Name the RNA nucleocapsid
viruses (3).
Definition
-Enteroviruses (poliovirus,
coxsackievirus, echovirus,
hepatitis A virus) -rhinovirus
-reovirus.
Term
Name the vaccines that are
killed (4).
Definition
-rabies -influenza -hepatitis
A -SalK=Killed
Term
Name the vaccines that are
live attenuated (6).
Definition
-MMR -Sabin polio -VZV -
yellow fever
Term
Of these 3 markers (HBsAg,
HBsAb, HBcAg), which ones
are positive in each of the 4
phases below: (acute disease,
window phase, complete
recovery, chronic carrier).
Definition
-HBsAg, HBcAg -HBcAg -
HBsAb, HBcAg -HBsAg,
HBcAg
Term
On HIV, what is gp41 and
gp120?
Definition
envelope protein
Term
On HIV, what is p24? (illus. p.
205)
Definition
rectangular nucleocapsid
protein
Term
Roughly, what are the time
periods for acute, latent, and
immunodeficient stages of
HIV?
Definition
Acute: 1-3 months Latent: 3
months-3years
Immunodefic.: 3 yrs.-death
(diagram p. 205 that follows
serologic course).
Term
Statement: HEV resembles
HAV in:
Definition
course, severity, and
incubation,
Term
Use the mneumonic PERCH to
name members of the
Picornavirus family.
Definition
-Poliovirus -Echovirus -
Rhinovirus -Coxsackievirus -
Hepatitis A
Term
Viral nucleic acids with
(choose) same/different
nucleic acids as host are
infective alone; others require
special enzymes (contained in
intact virion.)
Definition
same
Term
What 2 antigens are used to
classify influenza?
Definition
Neuraminadase,
Hemagglutinin
Term
What age group is the
primary target of
paramyxoviruses?
Definition
children
Term
What antiviral treatment is
approved for influenza A
(especially prophylaxis) but
not for influenza B & C
Definition
Amantadine and Rimantadine
Term
What antiviral treatment is
approved for influenza A and
B?
Definition
Zanamivir
Term
What are Councilman bodies
and what are they
pathomneumonic for?
Definition
acidophilic inclusions seen in
the liver of those with yellow
fever
Term
What are the 3 C's of
measles?
Definition
-Cough -Coryza -
Conjunctivitis
Term
What are the 4 C's of HCV.
Definition
Chronic, Cirrhosis,
Carcinoma, Carriers
Term
What are the 4 most common
diseases caused by prions?
Definition
-Creutzfeldt-Jakob disease
(CJD: rapid progressive
dementia) -kuru -scrapie
(sheep -'mad cow disease'
Term
What are the causes of SSPE
and PML in
immunocompromised pts.
Definition
-Late sequelae of measles -
Reactivation of JC virus
Term
What are the classic
symptoms of yellow fever?
Definition
-high fever -black vomitous -
jaundice
Term
What are the common
diseases (1) and routes of
transmission(1) for HHV-8?
Definition
-Kaposi's sarcoma (HIV pts.) -
sexual contact
Term
What are the common
diseases (2) and routes of
transmission(2) for EBV?
Definition
-infectious mono, Burkitt's
lymphoma -resp. secretions,
saliva
Term
What are the common
diseases (2) and routes of
transmission(2) for HSV-2?
Definition
-herpes genitalis, neonatal
herpes -sexual contact,
perinatal
Term
What are the common
diseases (3) and routes of
transmission(1) for VZV?
Definition
-varicella zoster (shingles) -
encephalitis -pneumonia
Term
What are the common
diseases (3) and routes of
transmission(2) for HSV-1?
Definition
-gingivostomatitis
keratoconjunctivitis temporal
lobe encephalitis herpes
labialis -respiratory
secretions and saliva
Term
What are the common
diseases (3) and routes of
transmission(6) for CMV?
Definition
-congenital infection, mono,
pneumonia -congenital,
transfusion, sexual contact,
saliva, urine, transplant
Term
What are the general
characteristics of a prion?
Definition
infectious agent that does not
contain RNA or DNA, consists
only of protein
Term
What are the major viruses of
the paramyxovirus family? (4)
Definition
-parainfluenza (croup) -RSV -
Measles -Mumps
Term
What are the primary
symptoms of the mumps
virus? (MOP)
Definition
-aseptic Meningitis -Orchitis
-Parotitis (mumps give you
bumps = parotitis)
Term
What are the primary viruses
of the picornavirus family?
(PERCH)
Definition
-Poliovirus -Echovirus -
Rhinovirus -Coxsackievirus -
Hepatitis A
Term
What are two classic illness
caused by arborviruses?
Definition
-dengue fever (break-bone
fever) -yellow fever
Term
What general form of
encephalopathies do prions
present as?
Definition
spongiform encephalopathies
Term
What genetic property does
segmentation afford viruses
and how does this play into
flu epidemics?
Definition
-Segmentation allows
reassorment to occur in RNA
viruses -this contributes to
antigenic shifts which cause
most flu pandemics.
Term
What group has a high
mortality rate from HEV?
Definition
pregnant women
Term
What hematologic finding is
characteristic of mono?
Definition
abnormal circulating
cytotoxic T cells (atypical
lymphocytes)
Term
What is HBcAb, and what
does it indicate?
Definition
Antibody to HBcAg; IgM
HBcAb indicates recent
disease
Term
What is HBcAg?
Definition
Antigen associated with core
of HBV
Term
What is HBeAb, and what
does it indicate?
Definition
Antibody to e antigen;
indicates low transmissibility
Term
What is HBeAg, and what
does it indicate?
Definition
it is a 2nd different antigen
marker of HBV core; indicates
transmissibility
(HBeAg=Beware)
Term
What is HBsAb, and what
does it do?
Definition
Antibody to HBsAg; provides
immunity to hepatitis B
Term
What is HBsAg, and what does
it indicate?
Definition
Antigen found on surface of
HBV; continued presence
indicates carrier state
Term
What is IgM HAVAb, and what
is it used to detect?
Definition
IgM antibody to HAV; best
test to detect active hepatitis
A
Term
What is meant by the 'window
period' in HBV infection, and
what is positive in this
period?
Definition
It is the period between
disappearance of HBsAg and
appearance of Anti-HBs;
HBcAb is pos. during this
period.
Term
What is the classic vector for
arborvirus?
Definition
Arthropods (mosquitos, ticks,
etc.) ARBOR=Arthropod Borne
Term
What is the function of
reverse transcriptase in HIV?
Definition
synthesize dsDNA from RNA
for integration into host
genome.
Term
What is the major mode of
protection from influenza
virus?
Definition
Killed viral vaccine which is
reformulated each year and is
given to those in high risk of
infection (elderly, healthworkers,
etc.)
Term
What is the method behind
ELISA/Western blot and
during what period of HIV
infection are they often
negative?
Definition
look for abs to viral proteins;
false negatives common in
first 1-2 months of infection
Term
What is the mneumonic for
remembering the Tzanck
smear?
Definition
Tzanck heavens I don't have
herpes.
Term
What is the only DNA virus
that is not double stranded?
Definition
Parvoviridae (ssDNA)
Term
What is the only RNA virus
that has dsRNA?
Definition
Reoviridae
['repeatovirus' (reovirus) is
dsRNA]
Term
What is the viral cause of the
common cold?
Definition
-Rhinovirus, 100+ serotypes
-Rhino has a Runny nose.
Term
What neurologic infection can
picornaviruses (except
rhinoviruses and hepatitis A
viruses) cause?
Definition
Aseptic Meningitis
Term
What physical finding is
diagnostic for measles?
Definition
Koplik spots (bluish-gray
spots on buccal mucosa)
Term
What population should not
receive a live vaccine?
Definition
Those who are
immunocompromised and
their close contacts.
Term
What reproductive
complication can mumps
cause?
Definition
sterility; especially after
puberty
Term
What shape are all the DNA
viruses? Which virus (1) is the
exception?
Definition
-Icosahedral -Poxvirus
(complex)
Term
What test is used to make the
presumptive dx of HIV, and
then, which test confirms the
dx?
Definition
ELISA (sensitive w/ high false
+ and low threshold);
Western blot (specific, high
false - rate with high
threshold)
Term
What tests are gaining
popularity for monitoring
drug tx efficacy in HIV?
Definition
PCR/viral load tests
Term
What type of genome does
HIV have?
Definition
diploid RNA
Term
What type of nucleic acid
structure does rotavirus have?
Definition
segmented dsRNA
Term
What type of transcription
occurs and what type of
polymerase does it possess?
Definition
-Reverse transcription -the
virion contains an RNAdependent
DNA polymerase
Term
What type of virus is HAV and
how is it transmitted?
Definition
-RNA picornavirus -fecal-oral
route
Term
What type of virus is HBV and
how is it transmitted?
Definition
-DNA hepadnavirus -
parenteral, sexual, and
maternal-fetal routes
Term
What type of virus is HCV and
how is it transmitted?
Definition
-RNA flavivirus -via blood
and resembles HBV in its
course and severity
Term
What type of virus is HDV and
what is special about its
envelope?
Definition
-delta agent, it is a defective
virus -requires HBsAg as its
evelope
Term
What type of virus is HEV and
how is it transmitted?
Definition
-RNA calicivirus -enteric
transmission; causes waterborne
epidemics
Term
What variant of dengue fever
is found in Southeast Asia?
Definition
hemorrhagic shock syndrome
Term
What virus causes and what
are the classic symptoms of
mononucleosis?
Definition
-EBV -fever,
hepatosplenomegaly,
pharyngitis,
lymphadenopathy (esp.
posterior auricular nodes)
Term
What virus causes yellow
(=flavi) fever, and what is its
vector and reservoirs (2)?
Definition
-flavivirus -Aedes mosquitos
-monkey or human reservoir
Term
What virus is the most
common global cause of
infantile gastroenteritis and
acute diarrhea (in the US).
Definition
Rotavirus
Term
Where do enveloped viruses
acquire their envelopes, and
what virus is the exception to
this rule?
Definition
-Plasma membrane -
Herpesviruses which acquire
their envelope from the
nuclear membrane
Term
Where in the cell do DNA
viruses replicate, and which
virus is the exception to this
rule?
Definition
-Nucleus -exception:
poxvirus in cytoplasm (carries
DNA-dependent RNA
polymerase)
Term
Where in the cell do RNA
viruses replicate, and what 2
viruses are the exception to
this rule?
Definition
-Cytoplasm -exception:
influenza virus and
retroviruses
Term
Which marker tests are
appropriate for each phase of
hepatitis infection:
Incubation, Prodrome/acute
illness, Early Convalescence,
Late Convalescence.
Definition
-HBsAg -HBsAg (Anti-HBc) -
Anti-HBc -Anti-HBs (anti-
HBc)
Term
Which two DNA viruses don't
have a linear genome?
(they're circular)
Definition
Papovaviruses and
Hepadnaviruses
Term
Which two hepatitis viruses
follow the fecal-oral route?
Definition
A and E; 'The vowels hit your
bowels.'
Term
Which two hepatitis viruses
predispose to hepatocellular
carcinoma?
Definition
HBV and HCV
Term
Why is mono called the
'kissing disease?'
Definition
-Peak incidence occurs
during peak kissing years
15-20 yo -(saliva
transmission)
Term
3 main roles of Ig binding to
bacteria
Definition
- opsonization -
neutralization - complement
activation
Term
A defect in phagocytosis of
neutrophils owing to lack of
NADPH oxidase activity or
similar enzymes is indicative
of what immune deficiency
disease?
Definition
Chronic granulomatous
disease
Term
After exposure to what 4
things are preformed
(passive) antibodies given?
Definition
Tetanus toxin, Botulinum
toxin, HBV, or Rabies.
Term
All nucleated cells have what
class of MHC proteins?
Definition
class I MHC proteins
Term
Anaphylaxis, asthma, or local
wheal and flare are possible
manifestations of which type
of hypersensitivity?
Definition
Type I
Term
Anti-gliadin autoantibodies
are associated with what
disease?
Definition
Celiac disease
Term
Anti-Scl-70 autoantibodies
are associated with what
disease?
Definition
diffuse Scleroderma
Term
Autoimmune hemolytic
anemia, Rh disease
(erythroblastosis fetalis), and
Goodpasture's syndrome are
examples of what kind of
hypersensitivity reaction?
Definition
type II hypersensitivity
Term
Class I major
histocompatibilty complex
consists of …
Definition
1 polypeptide, with B2-
microglobulin
Term
Class II major
histocompatibilty complex
consists of …
Definition
2 polypeptides, an a and a B
chain
Term
Cytotoxic T cells have CD(?),
which binds to class (?) MHC
on virus-infected cells.
Definition
CD8 binds to class I MHC
Term
Define acute transplant
rejection.
Definition
Cell-mediated due to
cytotoxic T lymphocytes
reacting against foreign
MHCs. Occurs weeks after
transplantation.
Term
Define adjuvant.
Definition
Adjuvants are nonspecific
stimulators of the immune
response but are not
immunogenic by themselves.
Term
Define chronic transplant
rejection.
Definition
Antibody-mediated vascular
damage (fibrinoid necrosis)--
irreversible. Occurs months
to years after transplantation.
Term
Define hyperacute transplant
rejection.
Definition
Antibody-mediated due to
the presence of preormed
anti-donor antibodies in the
transplant recipient. Occurs
within minutes after
transplantation.
Term
Define Ig allotype.
Definition
Ig epitope that differs among
members of the same species
(on light or heavy chain)
Term
Define Ig idiotype.
Definition
Ig epitope determine by the
antigen-binging site (specific
for a given antigen-binding
site)
Term
Define Ig isotype.
Definition
Ig epitope common to a
single class of Ig (5 classes,
determined by the heavy
chain)
Term
Give 3 classic examples of
bacteria with antigen
variation.
Definition
(1) Salmonella (2 flagellar
variants) (2) Borrelia
(relapsing fever) (3) Neisseria
gonorrhoeae (pilus protein)
Term
Give 3 examples of possibly
causes for SCID?
Definition
(1) failure to synthesize class
II MHC antigens (2) defective
Il-2 receptors (3) adenosine
deaminase deficiency
Term
Goodpasture's syndrome is
associated with what kind of
autoantibodies?
Definition
anti-basement membrane
antibodies.
Term
Helper T cells have CD(?)
which binds to class (?) MHC
on antigen-presenting cells.
Definition
CD4 binds to class II MHC
Term
How does Bruton's
agammaglobulinemia usually
present?
Definition
as bacterial infections in boys
after about 6 months of age,
when levels of maternal IgG
antibody decline
Term
How is active immunity
acquired?
Definition
Active immunity is induced
after exposure to foreign
antigens. There is a slow
onset with long-lasting
protection.
Term
How is passive immunity
acquired?
Definition
by receiving preformed
antibodies from another host.
Antibodies have a short life
span, but the immunity has a
rapid onset.
Term
IL-4 promotes the growth of
B cells and the synthesis of
what 2 immunoglobulins?
Definition
IgE and IgG
Term
In what immune deficiency do
neutrophils fail to respond to
chemotactic stimuli?
Definition
Job's syndrome
Term
In what T-cell deficiency do
the thymus and parathyroids
fail to develop owing to
failure of development of the
3rd and 4th pharyngeal
pouches?
Definition
Thymic aplasia (DiGeorge
syndrome)
Term
Job's syndrome is associated
with high levels of what
immunoglobulin?
Definition
IgE
Term
MHC I Ag loading occurs in __
(1?)__ while MHC II Ag loading
occurs in __(2?)__?
Definition
(1) in rER (viral antigens) (2)
in acidified endosomes.
Term
Primary biliary cirrhosis has
what kind of autoantibodies?
Definition
anti-mitochondrial antibodies
Term
Role of TH1 cells?
Definition
produce IL-2 (activate Tc cells
and further stimulate TH1
cell) and g-interferon
(activate macrophages)
Term
Role of TH2 cells?
Definition
produce IL-4 and IL-5 (help B
cells make Ab)
Term
Sensitized T lymphocytes
encounter antigen and then
release lymphokines which
leads to macrophage
activation' in what
hypersensitivity reaction?
Definition
Type IV
Term
TB skin test, transplant
rejection, and contact
dermatitis are examples of
what type of hypersensitivity
reaction?
Definition
Type IV
Term
The 3 kinds of MHC class I
genes are…
Definition
A, B, and C
Term
The 3 kinds of MHC class II
genes are…
Definition
DP, DQ, DR
Term
The Fc portion of
immunoglobulins are at the
__?__ terminal.
Definition
The carboxy terminal
Term
What 2 cytokines are secreted
by macrophages?
Definition
IL-1 and TNF-a
Term
What 2 kinds of
autoantibodies are specific
for systemic lupus?
Definition
Anti-dsDNA and anti-Smith
Term
What 3 cytokines are
classified as 'acute phase
cytokines'?
Definition
IL-1, IL-6, and TNF-a
Term
What 3 ways do interferons
interfere with viral protein
synthesis?
Definition
(1) alpha and beta interferons
induce production of a second
protein that degrades viral
mRNA (2) gamma interferons
increase MHC class I expression
and antigen presentation in all
cells (3) activates NK cells to
kill virus-infected cells.
Term
What affect do the acute
phase cytokines have on fat
and muscle?
Definition
mobilization of energy
reserves to raise body
temperature
Term
What affect do the acute
phase cytokines have on the
bone marrow?
Definition
Incr. Production of Colony
stim. Factor (CS) which leads
to leukocytosis
Term
What affect do the acute
phase cytokines have on the
hypothalamus?
Definition
increase body temperature
Term
What antibody isotype can
cross the placenta?
Definition
IgG
Term
What are 3 types of antigenpresenting
cells?
Definition
macrophages, B cells, and
dendritic cells
Term
What are the maim symptoms
of serum sickness an at what
period of time following Ag
exposure?
Definition
fever, urticaria, arthralgias,
proteinuria, lymphadenopathy
5-10 days after Ag exposure
Term
What are the major symptoms
of graft-vs.-host disease?
Definition
maculopapular rash, jaundice,
hepatosplenomegaly, and
diarrhea.
Term
What B- and T- cell
deficiency, assoc. with IgA
deficiency, presents with
cerebellar problems and
spider angiomas?
Definition
ataxia-telangiectasia
Term
What causes the tissue
damage associated with
Serum sickness?
Definition
formation of immune
complexes of foreign
particles and Abs that deposit
in membranes where they fix
complement
Term
What class of MHC proteins
are the main determinants of
organ rejection?
Definition
class II MHC
Term
What complement
components can cause
anaphylaxis?
Definition
C3a and C5a
Term
What components of the
alternative complement
pathway make the C3
convertase?
Definition
C3b, Bb
Term
What components of the
alternative complement
pathway make the C5
convertase?
Definition
C3b, Bb, and 3b
Term
What components of the
classic complement pathway
make the C3 convertase?
Definition
C4b, C2b
Term
What components of the
classic complement pathway
make the C5 convertase?
Definition
C4b, 2b, and 3b
Term
What components of the
complement pathway are
deficient in Neisseria sepsis?
Definition
The MAC complex--(C5b, C6,
C7, C8, C9)
Term
What cytokines attract and
activate neutrophils?
Definition
TNF-a and B
Term
What disease is associated
with a X-linked defect in a
tyrosine-kinase gene
associated with low levels of
all classes of
immunoglobulins?
Definition
Bruton's
agammaglobulinemia
Term
What disease is associated
with anti-epithelial cell
autoantibodies?
Definition
Pemphigus vulgaris
Term
What disease is associated
with anti-microsomal
autoantibodies?
Definition
Hashimoto's thyroiditis
Term
What does a deficiency of C1
esterase inhibitor cause (in
the complement cascade)?
Definition
angioedema because of
overactive complement
Term
What does a deficiency of C3
cause (in the complement
cascade)?
Definition
can lead to severe, recurrent
pyogenic sinus and
respiratory tract infections.
Term
What does deficiency of
decay-accelerating factor
(DAF) in the complement
cascade cause?
Definition
leads to paroxysmal
nocturnal hemoglobinuria
(PNH)
Term
What does Job's syndrome
classically present with?
Definition
recurrent 'cold' (noninflamed)
staphylococcal abscesses
Term
What does TNF-a stimulate
dendritic cells to do during
the acute phase response?
Definition
TNF-a stimulates their
migration to lymph nodes
and their maturation for the
initiation of the adaptive
immune response.
Term
What elements of the
complement cascade made
the Membrane Attack
Complex (MAC)?
Definition
C5b, C6, C7, C8, and C9
Term
What Ig is found in secretions
as a monomer or a dimer?
Definition
IgA
Term
What Ig is found in secretions
as a monomer or a pentamer?
Definition
IgM
Term
What immune deficiency
disease has an autosomalrecessive
defect in
phagocytosis that results
from microtubular and
lysosomal defects of
phagocytic cells?
Definition
Chediak-Higashi disease
Term
What immune deficiency is
associated with elevated IgA
levels, normal IgE levels, and
low IgM levels?
Definition
Wiskott-Aldrich syndrome
Term
What immune deficiency
presents with tetany owing to
hypocalcemia, congenital
defects of the heart and great
vessels, and recurrent viral,
fungal, and protozoal
infections?
Definition
Thymic aplasia (DiGeorge
syndrome)
Term
What immunoglobulin isotype
has the lowest concentration
in serum?
Definition
IgE
Term
What immunoglobulin isotype
is involved in type-I
hypersensitivity reactions?
Definition
IgE
Term
What immunoglobulin isotype
is produced in the primary
response to an antigen and is
on the surface of B cells?
Definition
IgM
Term
What immunoglobulin isotype
mediates immunity to worms?
Definition
IgE
Term
What immunoglobulin isotype
prevents the attachment of
bacteria and viruses to
mucous membranes?
Definition
IgA
Term
What immunoglobulins bind
and activate the classic
complement pathway?
Definition
IgG and IgM (the Fc portion)
Term
What interleukin induces
naive helper T-cells to
become TH1 cells?
Definition
IL-12
Term
What interleukin induces
naive helper T-cells to
become TH2 cells?
Definition
IL-4
Term
What interleukin stimulates
the growth of both helper and
cytotoxic T-cells?
Definition
IL-2
Term
What is Chronic
mucocutaneous candidiasis?
Definition
T-cell dysfunction specifically
against Candida albicans.
Term
What is important about the
CD3 complex?
Definition
It is a cluster of polypeptides
associated with a T-cell
receptor and is important in
signal transduction.
Term
What is the cellular process
that causes type I
hypersensitivity?
Definition
Ag cross-links IgE on
presensitized mast cells and
basophils, triggering the
release of vasoactive amines.
Term
What is the cellular process
that causes type II
hypersensitivity?
Definition
IgM, IgG bind to Ag on
'enemy' cell, leading to lysis
(by complement) or
phagocytosis (its cytotoxic).
Term
What is the main antibody in
the secondary immune
response?
Definition
IgG
Term
What is the most abundant
immunoglobulin isotype?
Definition
IgG
Term
What is the most common
selective immunoglobulin
deficiency?
Definition
selective IgA deficiency
Term
What is the rise in
temperature during the acute
phase response help do (3
things?)
Definition
(1) increase specific immune
response (2) increase antigen
processing (3) decrease viral
and bacterial replication
Term
What is the triad of symptoms
seen with Wiskott-Aldrich
syndrome?
Definition
recurrent pyogenic infections,
eczema, and
thrombocytopenia
Term
What kind of autoantibodies
are associated with CREST/
Scleroderma?
Definition
anti-centromere antibodies
Term
What kind of autoantibodies
are known as rheumatoid
factor?
Definition
anti-IgG antibodies
Term
What kind of immunity
(antibody-mediated or cell
mediated) is involved in
autoimmunity?
Definition
antibody-mediated immunity
(B cells)
Term
What kind of immunity
(antibody-mediated or cell
mediated) is involved in graft
and tumor rejection?
Definition
cell mediated immunity (T
cells)
Term
What kind of transplant
rejection is reversible with
immunosuppressants such as
cyclosporin and OKT3?
Definition
acute transplant rejection
Term
What kinds of adjuvants are
included in human vaccines?
Definition
aluminum hydroxide or lipid
Term
What kinds of cells have class
II MHC proteins?
Definition
antigen-presenting cells (e.g.
macrophages and dendritic
cells)
Term
What parasites have antigen
variation?
Definition
trypanosomes (programmed
rearrangement)
Term
What symptoms characterize
the Arthus reaction and what
causes them?
Definition
edema, necrosis, and
activation of complement due
to the Ag-Ab complexes that
form in the skin following
intradermal injection of Ag.
Term
What type of cell secretes
IL-3?
Definition
activated T-cells
Term
What type of cells does
gamma interferon stimulate?
Definition
macrophages
Term
What type of hypersensitivity
reaction is the Arthus
reaction?
Definition
type III
Term
Where does the alternative
complement pathway occur?
Definition
On microbial surfaces
Term
Where does the classic
complement pathway occur?
Definition
antigen-antibody complexes
Term
Where is the defect in SCID?
Definition
the defect is in early stemcell
differentiation, leading to
B- and T-cell deficiency
Term
Which interleukin causes
fever?
Definition
IL-1
Term
Which interleukin enhances
the synthesis of IgA?
Definition
IL-5
Term
Which interleukin stimulates
the production and activation
of eosinophils?
Definition
IL-5
Term
Which interleukin supports
the growth and differentiation
of bone marrow stem cells?
Definition
IL-3
Term
Which is the only type of cellmediated
hypersensitivity
reaction, and thus not
transferable by serum?
Definition
Type IV
Term
Wiskott-Aldrich syndrome is
a defect in the ability to
mount what immune
response?
Definition
an IgM response to capsular
polysaccharides of bacteria.
Term
With what disease are antihistone
autoantibodies
associated?
Definition
drug-induced lupus
Term
With what disease are antinuclear
antibodies
associated?
Definition
systemic lupus
Term
Aspiration pneumonia is
usually caused by…
Definition
Anaerobes
Term
Atypical pneumonia is usually
caused by…
Definition
- Mycoplasma - Legionella -
Chlamydia
Term
Bug Hints: Branching rods in
oral infection =
Definition
Actinomyces israelii
Term
Bug Hints: Currant jelly
sputum =
Definition
Klebsiella
Term
Bug Hints: Dog or cat bite =
Definition
Pasteurella multocida
Term
Bug Hints: Dog or cat bite =
Definition
Pasteurella multocida
Term
Bug Hints: Pediatric Infection
=
Definition
H. influenzae (including
epiglottitis)
Term
Bug Hints: Pneumonia in CS,
burn infection =
Definition
P. aeruginosa
Term
Bug Hints: Pus, Empyema,
Abscess =
Definition
S. aureus
Term
Bug Hints: Sepsis/Meningitis
in Newborn =
Definition
Group B strep
Term
Bug Hints: Surgical wound =
Definition
S. aureus
Term
Bug Hints: Traumatic open
wound =
Definition
C. perfringens
Term
Incidence of what cause of
mengitis has decreased with a
vaccine?
Definition
Incidence of H. influenze
meningitis has decreased
greatly with introduction of H.
influenzae vaccine in the last
10-15 years
Term
Most osteomyelitis occurs in
what age group?
Definition
children
Term
Neonatal pneumonia is
usually caused by…
Definition
- Group B streptococci - E.
coli
Term
Nosocomial pneumonia is
usually caused by…
Definition
- Staphylococcus - gramnegative
rods
Term
PID includes what disorders
in the body?
Definition
salpingitis, endometritis,
hydrosalpinx, tubo-ovarian
abscess
Term
PID is likely caused by what
two organisms? What are the
characteristics of the disease
caused by each organism?
Definition
-Chlamydia trachomatis:
subacute, often undiagnosed
- N. gonorrhoeae:acute, high
fever
Term
Pneumonia in
immunocompromised
patients is caused by…
Definition
- Staphylococcus - gramnegative
rods - fungi -
viruses - Pnemumocystis
carinii (with HIV)
Term
Pneumonia in the alcoholic/IV
drug user is usually caused
by…
Definition
- S. pneumoniae - Klebsiella
- Staphylococcus
Term
Postviral pneumonia is
usually caused by…
Definition
- Staphylococcus - H.
influenzae
Term
Salpingitis is a risk factor
for…
Definition
- ectopic pregnancy -
infertility -chronic pelvic pain
- adhesions
Term
UTIs are found in men in
which 2 age groups?
Definition
Babies with congenital
defects and Elderly with
enlarged prostates
Term
UTIs are mostly caused how?
Definition
by ascending infections
Term
What's the likely cause of
osteomyelitis in a pt where
you have no other
information?
Definition
S. aureus
Term
What 2 pathogens likely
cause nosocomial infections
associated with urinary
catherization?
Definition
E. coli, Proteus mirabilis
Term
What 2 pathogens likely
cause nosocomial infections
in the newborn nursery?
Definition
CMV, RSV
Term
What 3 UTI-causing
organisms are often
nosocomial and drugresistant?
Definition
- Serratia marcescens -
Enterobacter cloacae -
Klebsiella pneumoniae -
Proteus mirabilis -
Pseudomonas aeruginosa
Term
What 7 organisms are
associated with UTIs?
Definition
- Serratia marcescens -
Staphylococcus saprophyticus
- E. coli - Enterobacter
cloacae - Klebsiella
pneumoniae - Proteus
mirabilis - Pseudomonas
aeruginosa [HINT: SEEKS PP]
Term
What abnormal lab result is
often seen in osteomyelitis
patients?
Definition
elevated ESR
Term
What are 4 clinical findings of
Pyelonephritis?
Definition
- fever - chills - flank pain -
CVA tenderness [c/c with UTI]
Term
What are 4 clinical findings of
UTIs?
Definition
- diysuria - frequency -
urgency - suprapubic pain [c/
c with pyelonephritis]
Term
What are the 2 most common
causes of nosocomial
infections?
Definition
- E. coli causes UTI - S.
aureus causes wound
infection
Term
What are the 3 most common
causes of UTI in young
ambulatory women?
Definition
1. E. coli (50-80%) 2.
Staphylococcus saprophyticus
(10-30%) 3. Klebsiella
(8-10%)
Term
What are the common causes
of hospital-acquired UTIs?
Definition
- E. coli - Proteus - Klebsiella
- Serratia - Pseudomonas
Term
What are the common causes
of meningitis in 6-60y/o?
Definition
- N. MENINGITIDIS -
Enteroviruses - S.
pneumoniae - HSV
Term
What are the common causes
of meningitis in 60+ y/o?
Definition
- S. PNEUMONIAE - Gramnegative
rods - Listeria
Term
What are the common causes
of meningitis in children
(6mo-6y/o)?
Definition
- S. pneumoniae - N.
meningitidis - H. influenzae B
- Enteroviruses
Term
What are the common causes
of meningitis in HIV pts?
Definition
- Cryptococcus - CMV -
toxoplasmosis (brain abscess)
JC virus (PML)
Term
What are the common causes
of meningitis in newborns
(0-6mos)?
Definition
- GROUP B STREPTOCOCCI -
E. COLI - Listeria
Term
What are the common causes
of osteomyelitis in those with
prosthetic replacements?
Definition
S. aureus and S. epidermidis
Term
What are the common causes
of pneumonia in adults
18-40 y/o?
Definition
- Mycoplasma - C.
pneumoniae - S. pneumoniae
Term
What are the common causes
of pneumonia in adults
40-65 y/o?
Definition
- S. pneumoniae - H.
influenzae - Anaerobes -
Viruses - Mycoplasma
Term
What are the common causes
of pneumonia in children
(6wk-18y)?
Definition
- Viruses (RSV) - Mycoplasma
- Chlamidia pneumonia S.
pneumoniae
Term
What are the common causes
of pneumonia in the elderly?
Definition
- S. pneumoniae - Anaerobes
- Viruses - H. influenzae -
Gram-neg. rods
Term
What are the CSF finings in
bacterial meningitis
(pressure, cell type, protein
and sugar levels)?
Definition
- Pressure: incr. - Cell type:
incr. PMNs - Protein: incr -
Sugar: decr
Term
What are the CSF finings in
bacterial meningitis
(pressure, cell type, protein
and sugar levels)?
Definition
- Pressure: nl or incr. - Cell
type: incr. lymphocytes -
Protein: nl - Sugar: nl
Term
What are the CSF finings in
fungal/TB meningitis
(pressure, cell type, protein
and sugar levels)?
Definition
- Pressure: incr. - Cell type:
incr. lymphocytes - Protein:
incr - Sugar:decr.
Term
What are the dominant
normal florae in the colon?
Definition
B fragilis > E. coli
Term
What are the dominant
normal florae in the vagina?
Definition
Lactobacillus, colonized by E.
coli and group B strep
Term
What are the predisposing
factors of UTIs?
Definition
- flow obstruction - kidney
surgery - catherization -
gynecologic abnormailities -
diabetes - pregnancy
Term
What infections are
dangerous in pregnancy?
Definition
- Toxoplasma - Rubella -
CMV - HSV/HIV -Syphilis
[HINT: ToRCHeS]
Term
What is chandelier sign?
Definition
Cervical motion tenderness
associated with PID
Term
What is the 2nd leading cause
of community-acquired UTI in
sexually active women?
Definition
Staphylococcus saprophyticus
Term
What is the characterisitc of
Trichomonas on a slide?
Definition
motile on wet prep
Term
What is the common cause of
osteomyelitis in drug addicts?
Definition
Pseudomonas aeruginosa
Term
What is the common cause of
osteomyelitis in most people?
Definition
S. aureus
Term
What is the common cause of
osteomyelitis in sickle cell
pts?
Definition
Salmonella
Term
What is the common cause of
osteomyelitis in the sexually
active?
Definition
N. gonorrhoeae
Term
What is the common cause of
osteomyelitis in the vertebra?
Definition
M. tuberculosis
Term
What is the dominant normal
flora contributes to dental
plaque?
Definition
S. mutans
Term
What is the dominant normal
flora in the nose?
Definition
S. aureus
Term
What is the dominant normal
flora in the oropharynx?
Definition
viridans streptococci
Term
What is the dominant normal
flora on the skin?
Definition
S. epidermidis
Term
What is the most common
STD in the U.S.?
Definition
Chlamydia trachomatis
causes 3-4 million cases per
year
Term
What organism can you
presume is causing a
nosocomial infection if
respiratory equipment or
burns are involved?
Definition
Pseudomonas aeruginosa
Term
What organism is the leading
cause of UTI and shows a
metallic sheen on EMB agar?
Definition
E. coli
Term
What pathogen is associated
with hyperalimentation?
Definition
Candida albicans
Term
What pathogen is associated
with water (ie. aerosols)?
Definition
Legionella
Term
What pathogen likely causes
nosocomial infections in the
renal dialysis unit?
Definition
HBV
Term
What population does not
have any flora?
Definition
Neonates delivered by
csarean section have no flora
but are rapidly colonized
after birth
Term
What population does not
have any flora?
Definition
Neonates delivered by
csarean section have no flora
but are rapidly colonized
after birth
Term
What ratio is UTIs found more
in women vs. men? Why?
Definition
10 to 1 because women have
short urethrae more likely to
be colonized by fecal flora
Term
What STD is associated with
Argyll-Robertson pupil?
Definition
3' Syphilis
Term
What STD is associated with
clue cells?
Definition
Garnerella
Term
What STD is associated with
Genital warts and loilocytes?
What is the causative agent?
Definition
- Condylomata acuminata -
HPV 6 and 11
Term
What STD is associated with
jaundice? What is the
causative agent?
Definition
- Hepatitis B - HBV
Term
What STD is associated with
opportunistic infections,
Kaposi's sarcoma, lymphoma?
What is the causative agent?
Definition
- AIDS -HIV
Term
What STD is associated with
painful penile, vulvar or
cervical ulcers? What's the
causative agent?
Definition
-Genital Herpies - HSV-2
Term
What STD is associated with
painful ulcers,
lymphadenopathy, rectal
strictures? What is the
causative agent?
Definition
- Lymphogranuloma
venereum - Chlamydia
trachomatis
Term
What STD is associated with
urethritis, cervicitis,
conjuntivitis, Reiter's
syndrome PID? What is the
causative agent?
Definition
Chlamydia - Chlamydia
trachomatis
Term
What STD is associated with
vaginitis? What is the
causative agent?
Definition
-Trichomoniasis -
Trichomonas vaginalis
Term
What STD is characterized by
painful genital ulcer? What is
the causative agent?
Definition
- chancroid - Haemophilus
ducreyi
Term
What STD is likely in a patient
with a painless chancre? What
causes it?
Definition
- 1' Syphilis - Treponema
pallidum
Term
What STD is likely in a patient
with fever, lymphadenopathy,
skin rashes, condylomata
lata? What causes it?
Definition
- 2' Syphilis - Treponema
pallidum
Term
What STD is likely in a patient
with gummas, tabes dorsalis,
general paresis, aortitis,
Argyll-Robertson pupil? What
causes it?
Definition
- 3' Syphilis - Treponema
pallidum
Term
What STD is likely in a patient
with urethritis, cervicitis, PID,
prostatitus, epididymitis,
arthritis? What organism
causes it?
Definition
- Gonorrhea - Neisseria
gonorrhoeae
Term
What UTI-causing organism
has a bue-green pigment,
fruity odor and is usually
nosocomial and drugresistant?
Definition
Pseudomonas aeruginosa
Term
What UTI-causing organism is
characterized by a large
mucoid capsule and viscous
colonies?
Definition
Klebsiella pneumoniae
Term
What UTI-causing organism is
mobile, causing 'swarming'
on agar and also produces
urease and is associated with
struvite stones?
Definition
Proteus mirabilis
Term
What UTI-causing organism
sometimes produces a red
pigment, is often nosocomial
and drug-resistant?
Definition
Serratia marcescens
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