Shared Flashcard Set

Details

MICRO
CH2121
76
Microbiology
Undergraduate 1
06/24/2013

Additional Microbiology Flashcards

 


 

Cards

Term
What bacteria is responsible for the most common bacterial gastroenteritis in the US?
Definition
Campylobacter jejuni
Term
A pt in an urgent care clinic reports having frequent episodes of diarrhea with abdominal pain & fever for several days. The pt reports an allergy to shellfish. A recent bowel movement contains traces of blood. A fecal sample shows the prescence of Gram-negative, curved, motile, urease-negative bacteria. What bacteria is most likely responsible for pt's symptoms?
Definition
Campylobacter jejuni
Term
Shortly after returning from a trip to several continents, a yound man experiences episodes of fever, chills, muscle aches, and HA that recur at irregular intervals. The young man reports carrying only a large backpack and commonly staying in hostels long the way. What disease is he likely to have?
Definition
louse-borne relapsing fever
Term
The emergin disease known as anaplasmosis is trasmitted by?
Definition
ticks
Term
What is TRUE about rickettsias?
Definition
They are obligate intracellular parasites, they can sunthesize small amounts of peptidoglycan, they have genes for protein synthesis, they divide by binary fission.
Term
What is FALSE regarding rickettsias?
Definition
They can live outside the host for long periods of time
Term
Transovarian transmission is a process in which?
Definition
an infected female vector transmits the pathogen to the eggs forming in its ovaries
Term
Rocky Mountain spotted fever (RMSF) is caused by Rickettsia rickettsii, a pathogen that?
Definition
infects the lining of blood vessels and leads to leaking of plasma into tissue.
Term
Scrub typhus is caused by?
Definition
Orientia tsutsugamushi
Term
Rickettsia prowazekii is transmitted by?
Definition
the human body louse Pediculus humanus
Term
What is TRUE about Ehrlichia?
Definition
The organism resproduces inside the host's phagosomes, it is transmitted by ticks, it has three stages: elementary body, initial body, and morula, it is emergin infectious disease
Term
What is FALSE about Ehrlichia?
Definition
It usually causes a spotted rash similar to Rocky Mountain spotted fever
Term
Epidemic typhus can recall many yeas after an initial episode; the recurrent disease is called?
Definition
Brill-Zinsser disease
Term
What disease is considered an emerging disease b/c it was unknown before 1987?
Definition
human monocytic ehrlichiosis
Term
What microorganisms have been referred to as energy parasites?
Definition
chlamydias
Term
Endosomes filled with multiplying chlamydia are known as?
Definition
inclusion bodies
Term

Which of the following pairs is MISMATCHED?

A)elementary bodies-dormant noninfectious form

B)reticulate bodies-replicate via binary fission in endosomes

C)reticulate bodies- large variable shape

D)inclusion bodies-RB filled endosomes

E)elementary bodies- small cocci

Definition
A)elementary bodies-dormant noninfectious form
Term
What pathogen causes the most commonly reported sexually transmitted disease in the US.
Definition
Chlamydia trachomatis
Term
The most specific method for diagnosing chlamydia is by?
Definition
demonstrating the presence of the pathogen in cell culture by means of fluorescent antibodies
Term
The sexually transmitted form of chlamydia?
Definition
is caused by the LGV strain of Chlamydia trachomatis
Term
What is an intracellular parasite of humans that usually causes a mild pneumonia?
Definition
Chlamydophila pneumoniae
Term
What is TRUE regarding trachoma?
Definition
It leads to corneal scarring, it is the leading cause of nontraumatic blindness in humans, infants may contract the disease while passing through and infected birth canal, and it first infects the conjenctiva and kills cells there
Term
What is FALSE regarding trachoma?
Definition
it is most often a disease of adults who suffer from sexually transmitted chlamydia
Term
Sexually transmitted chlamydia is similar to infection with Yersinia pestis in that they both produce?
Definition
buboes
Term

Which of the following pairs is MISMATCHED?

A)Chlamydophila psittaci- endocarditis

B)Chlamydia trachomatis- nongonococcal urethritis

C)Chlamydia trachomatis- pneumonia

D)Chlamydia psittaci- parrot fever

E)Chlamydophila pneumoniae-sinusitis

Definition
C)Chlamydia trachomatis- pneumonia
Term
What is TRUE regarding spirochetes?
Definition
They are able to penetrate a host's tissues
Term
What microorganism gets its name form its resemblance to coiled hairs?
Definition
spirochetes
Term
What is a zoonosis caused by a spirochete?
Definition
leptospirosis
Term
Treponema pallidum can be trasmitted?
Definition
Through sexual intercourse and from and infected mother to her unborn child
Term
What is TRUE concerning syphilis?
Definition
it is seen only in humans, it is thought to have originated in Western Hemisphere, untreated, the disease goes through 4 stages, latency of the disease may last 30 years or more.
Term
What is FALSE concerning syphilis?
Definition
Its causative agent, Treponema pallidum, is easy to culture in the lab
Term
The typical lesion of primary syphilis is?
Definition
a painless reddened lesion called a chancre at the site of infection
Term
Diagnosis of Treponema pallidum is best made by?
Definition
using specific antibody tests against T. pallidum antigens
Term
The signs and symmptoms of infection with Helicobacter pylori are the result of?
Definition
invasion by H.pylori into the mucosa of the stomach
Term
What characteristic of Borrelia burgdorferi makes it an unusual bacterium?
Definition
it utilizes manganese instead of iron in its proeins and enzymes
Term
Leptospira interrogans gets its name from?
Definition
the fact that one endof the spirochete is curved like a question mark
Term
What characteristic does Vibrio share with Salmonella?
Definition
both have O polysaccaride antigens
Term
The most important virulence factor of Vibrio cholerae is?
Definition
its ability to produce a potent exotoxin
Term
A young woman who was recently hiking in the mountains and discovered a tick on her torso has a fever that came on quite suddenly. She has no rash, but she develops leukopenia. What disease is she most likely to have contracted?
Definition
anaplasmosis
Term
Lymphogranuloma venereum is caused by what organism?
Definition
Chlamydia trachomatis
Term
Epidemic typhus is caused by what organism?
Definition
Rickettsia prowazekii
Term
Ornithosis is caused by what organism?
Definition
Chlamydophila psittaci
Term
Pinta is caused by what organism?
Definition
Treponema carateum
Term
Epidemic relapsing fever is caused by what organism?
Definition
Borrelia recurrentis
Term
Common cause of bacterial gastorenteritis is caused by what organism?
Definition
Campylobacter jejuni
Term
Gastroenteritis from contaminated shellfish is caused by what organism?
Definition
Vibrio parahaemolyticus
Term
Peptic ulcers is caused by what organism?
Definition
Helicobacter pylori
Term
Syphilis is caused by what organism?
Definition
Treponema pallidum pallidum
Term
Yaws is caused by what organism?
Definition
Treponema pallidum pertenue
Term
Chlamydophila pneumoniae is suspected fo causing arteriosclerosis.
Definition
TRUE
Term
T/F All of the rickettsias are zoonoses.
Definition
FALSE
Term
T/F Campylobacter gastroenteritis is usually caused by ingestion of contaminated poultry.
Definition
TRUE
Term
T/F Vibrio vulnificus causes septicemia that is self-limiting and rarely fatal.
Definition
FALSE
Term
T/F A positive urease test from a gastric secretion is definite identification of Helicobacter pylori.
Definition
FALSE
Term
T/F All stages of Ixodes, the vector for Lyme disease, may feed on humans.
Definition
TRUE
Term
T/F Small doses of antimicrobial agents are very effective in treating the late stages of Borrelia infection b/c most of the symptoms result from immune responses.
Definition
FALSE
Term
T/F The cholera toxin is a potent exotoxin composed of five identical B subunits and one A subunit.
Definition
TRUE
Term
T/F An expanding rash that resembles a bull's-eye is characteristic of secondary syphilis.
Definition
FALSE
Term
T/F Humans are the only hosts for Rickettsia rickettsii.
Definition
Term
Eating shellfish contaminated with ___ can lead to potentially fatal septicemia.
Definition
Vibrio vulnificus
Term
The intracellular parasite ____ can infect newborns' eyes at the time of birth and may cause blindness.
Definition
chlamydia trachomatis
Term
Secondary infections with Clostridium may occur with _____.
Definition
Rocky Mountain spotted fever (RMSF)
Term
_____ IS fatal to its vector within 2-3 weeks, preventing transovarian transmission.
Definition
Rickettsia prowazekii
Term
____ is transmitted to humans by mites infected with Orientia.
Definition
Scrub typhus
Term
_____ is a disease of birds that can be transmitted to humans.
Definition
Ornithosis
Term
The infectious form of chlamydia is ______ .
Definition
the elementary body
Term
______ is the bacterium associated with peptic ulcer disease.
Definition
Helicobacter pylori
Term
The characteristic late stage of lesion of sexually transmitted chlamydia LGV is known as _____ .
Definition
lymphoaranuloma venereum
Term
The characteristic lesions for tertiary syphilis is presence of ___ in bones, in nervous tissue, or on the skin.
Definition
gummas
Term
_____ is a nonveneral reponemal disease transmitted by contaminated eating utensils and primarily affects children in Africa, Asia, and Australia.
Definition
Bejel
Term
____ is an unusual bacterium that lacks iron-containing enzymes and proteins and causes Lyme disease in humans.
Definition
Borrelia burgdorferi
Term
Relapsing fever is caused by a spirochete known as _____ , which is capable of frequently changing its antigenic surgace components.
Definition
Borrelia recurrentis
Term
____ grows on a special medium enriched with rabbit serum or bovine serum albumin.
Definition
Leptospira interrogans
Term
The normal habitat for ___ is salt water.
Definition
Vibrio cholerae
Term
What is transovarian transmission?
Definition
is a mode of transmmission seen in ticks and some other vectors. In the case of trasmission of Rickettsia rickettsii by ticks, the infected female passes the bacterium to the eggs in her ovary, producing a new generation infected with the bacterium. This mode of transmission contributes to the spread of Rocky Mountain spotted fever (RMSF), caused by R. rickettsii.
Supporting users have an ad free experience!