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Exam 3 Flashcards from Professor
Exam 3 Flashcards from Professor
190
Biology
Undergraduate 3
03/07/2015

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Term
To isolate Brucella, blood cultures & bone marrows are held for ___ days when nonautomated BC systems are utilized;
Definition
30
Term
To isolate Brucella, blood cultures & bone marrows are held for ___ days for automated BC systems.
Definition
10
Term
To isolate Brucella, the specimens are subcultured ________ to BAP & CHOC and held for 1 week.
Definition
weekly
Term
How long should anaerobe jars/bags be held before reading the plates?
Definition
48 hours
Term
Name two nonfermentors that are oxidase negative.
Definition
Acinetobacter & Stenotrophomonas
Term
Although Actinobacillus actinomycetemcomitans is an aerobic organism, it is often found in association with an anerobic organism. What is that MO?
Definition
Actinomyces israelii
Term
What is the name of the anaerobic, branching GPB?
Definition
Actinomyces
Term
Which organism produces molar tooth colonies?
Definition
Actinomyces
Term
Which organism produces sulfur granules?
Definition
Actinomyces
Term
Which two organisms appear as enterics on EMB & MAC, are oxidase positive, and ferment glucose? (some species can also ferment lactose)
Definition
Aeromonas & Plesiomonas
Term
Which organisms are associated with water?
Definition
Aeromonas, Legionella (airborne/respiratory), Vibrio, & P. aeruginosa
Term
Which organisms are associated with dogs &/or cats?
Definition
B. henselae, Pasteurella, & Capnocytophaga canimorsus/cynodegmi
Term
What is the identification of the following organism:
GNB, anaerobe
K, V, C & Bile = R
BBE = black
Definition
Bacteroides fragilis
Term
Which organism causes cat scratch fever, bacteremia, bacillary angiomatosis?
Definition
Bartonella henselae
Term
Which organism causes trench fever, bacteremia, bacillary angiomatosis?
Definition
Bartonella quintana
Term
Name two aerobic organisms that require special transport media.
Definition
Bordetella & Chlamydia
Term
Which organism causes whooping cough?
Definition
Bordetella pertussis
Term
Which organism produces mercury drop colonies?
Definition
Bordetella
Term
Which organism causes Lyme disease?
Definition
Borrelia burgdorferi
Term
Which organism is associated with lice?
Definition
Borrelia recurrentis
Term
Which organism causes relapsing fever?
Definition
Borrelia recurrentis
Term
Which organisms are considered laboratory hazards?
Definition
Brucella & Francisella
Term
Which organisms are identified presumptively and then referred to the Arkansas Health Department?
Definition
Brucella & Francisella
Term
Which organism causes undulant fever?
Definition
Brucella
Term
Name two organisms associated with cystic fibrosis patients.
Definition
Bulkholderia cepacia & mucoid Pseudomonas aeruginosa
Term
Which organism causes cepacia syndrome?
Definition
Burkholderia cepacia
Term
Interpret the following cytotoxicity test results:
Stool + antitoxin + tissue cells = No CPE
Stool + tissue cells = CPE
Definition
C. difficile toxin present
Term
Which organisms need a microaerobic atmosphere for growth?
Definition
Campylobacter & Helicobacter
Term
Name the organism associated with bacteremia in immunocompromised patients.
Definition
Campylobacter fetus subsp fetus
Term
Which organisms are associated with a variety of animals other that cats & dogs?
Definition
Campylobacter, Brucella, Franciscella, & Coxiella
Term
HACEK mnemonic stands for the following organisms: Haemophilus species, especially aphrophilus, Actinobacillus actinomycetemcomitans, _________________, ________________ & ___________________ .
Definition
Cardiobacterium hominis, Eikenella corrodens, & Kingella species
Term
Which organism causes trachoma?
Definition
Chlamydia trachomatis
Term
Which organism causes antibiotic associated diarrhea & pesudomembranous colitis?
Definition
Clostridium difficile
Term
Which organism causes gas gangrene & septicemia?
Definition
Clostridium perfringens
Term
What is the identification of the following organism:
Double zone of hemolysis
Reverse CAMP = +; lecithinase = +
Nagler = +
Definition
Clostridium perfringens
Term
Which organism produces a double zone of hemolysis?
Definition
Clostridium perfringens
Term
What is the name of the anaerobic, spore forming GPB?
Definition
Clostridium
Term
Which organism causes Q fever?
Definition
Coxiella burnetii
Term
Which organism causes human monocytic ehrlichiosis?
Definition
Ehrlichia chaffeensis
Term
Which organism smells like bleach?
Definition
Eikenella corrodens
Term
Which organism pits the agar?
Definition
Eikenella corrodens
Term
Which organism is associated with human bites &/or fist fights?
Definition
Eikenella corrodens
Term
Besides Clostridium what other anaerobic GPB are described in the notes?
Definition
Eubacterium & Bifidobacterium
Term
Which organisms produce yellow pigment?
Definition
Flavobacteria & Capnocytophaga
Term
Which organism causes rabbit fever?
Definition
Franciscella tularensis
Term
Some organisms are not commonly cultured, but are detected by using serological methods. What are these organisms?
Definition
Francisella, Brucella, Heliobacter, Coxiella, & Bartonella
Term
Which organism is associated with bacterial vaginosis?
Definition
Garnerella vaginalis
Term
Which organism is associated with the production of clue cells in vaginal specimens?
Definition
Garnerella vaginalis
Term
What is the identification of the following organism:
Clue cells on wet mount
Beta-hemolytic on HBT
Starch +
Definition
Garnerella vaginalis
Term
What is the identification of the following organism:
GNB, S shapes & gull wings
Grows on BAP & CHOC at 37
Rapid urease = +
Definition
Helicobacter pylori
Term
Name the organism that causes gastric ulcers.
Definition
Helicobacteria pylori
Term
Which organism causes joint infections in young children?
Definition
Kingella kingae
Term
Name four organisms that are detected by DFA.
Definition
Legionella, Francisella, Chlamydia trachomatis, & Rickettsia rickettsii
Term
Which organism is found in animal urine?
Definition
Leptospira
Term
Which organism is a GNB and sensitive to penicillin?
Definition
Moraxella
Term
Mycoplasma ____________ is associated with genital tract infections.
Definition
hominis
Term
Name the organism that causes primary atypical pneumoniae.
Definition
Mycoplasma pneumoniae
Term
Which organism causes a rise in cold agglutinins?
Definition
Mycoplasma pneumoniae
Term
Which organism produces fried-egg colonies?
Definition
Mycoplasma
Term
Which organisms are considered nonfermenters?
Definition
P. aeruginosa, Burkholderia, Stenotrophomonas, Acinetobacter & Moraxella
Term
What is the name of the anaerobic GPC?
Definition
Peptostreptococcus anaerobius
Term
What is the identification of the following organism:
GPC, anaerobe
SPS = S
Definition
Peptostreptococcus anaerobius
Term
Which organisms produce black pigment?
Definition
Prevotella & Porphyromonas (same ones that fluoresce red w/ UV light)
Term
What is the name of the anaerobic, small GPB (Chinese lettering)?
Definition
Propionibacterium acnes
Term
What is the identification of the following organism:
GPB (Chinese letters); anaerobe
indole = +; catalase = +
Definition
Propionibacterium acnes
Term
Which organism is called anaerobic diphtheroids?
Definition
Propionibacterium
Term
Which organism causes swimmer's ear?
Definition
Pseudomonas aeruginosa
Term
What is the identification of the following organism:
pyocyanin production; oxidase +
growth at 42; TSI = K/K
Definition
Pseudomonas aeruginosa
Term
Which organism smells like corn taco or grapes?
Definition
Pseudomonas aeruginosa
Term
Which organism causes Rock Mountain spotted fever?
Definition
Rickettsia rickettsii
Term
Which organisms cause rat bite fever?
Definition
Spirillium minor & Streptobacillus moniliformis
Term
Which organism is multi-resistant but can be treated with SXT (trimethoprim sulfamethoxazole)?
Definition
Stenotrophomonas maltophilia
Term
Which organism causes syphilis?
Definition
Treponema pallidum
Term
Which organisms can be identified by using darkfield microscopy?
Definition
Treponema pallidum & Spirillium minus
Term
How do Vibrio cholerae/alginolyticus & Vibrio vulnificus/parahaemolyticus appear on TCBS?
Definition
V. cholerae/alginolyticus = yellow (ferment sucrose); others are blue-green
Term
What is the name of the anaerobic GNC?
Definition
Veillonella
Term
Which organisms move by "darting"?
Definition
Vibrio cholerae & Campylobacter
Term
Most of the vibrios are halophilic (require salt for growth). Which vibrio is nonhalophilic?
Definition
Vibrio cholerae
Term
Which organism produces rice-water stool?
Definition
Vibrio cholerae
Term
Patients with underlying liver disease are especially at risk if infected with _________ ___________.
Definition
Vibrio vulnificus
Term
Burkholderia, Moraxella, Kingella, & Eikenella are all oxidase positive. Name other organisms that are oxidase positive.
Definition
Vibrio, Campy/Helico, Aeromonas, & Plesiomonas (also Pseudomonas)
Term
Which organism causes cholera?
Definition
Vibro cholerae
Term
How long does it take to achieve anaerobic conditions in the anaerobic jars?
Definition
1-2 hours to achieve ANA conditions;
Term
How long does it take for the indicator to turn white in the anaerobic jars?
Definition
3-4 hours for the indicator to turn
Term
Which organism causes human granulocyte anaplasmosis?
Definition
Anaplasma phagocytophilum
Term
What are the names of the anaerobic GNBs?
Definition
Bacteroides, Prevotella, Porphyromonas, & Fusobacterium
Term
Which organism causes melioidosis and is known as the Vietnamese time bomb?
Definition
Burkholderia pseudomallei
Term
Two organisms that were previously in the Chlamydia genus are now in a genus called Chlamydophila. What are these organisms and what diseases do they cause?
Definition
C. pneumoniae causes pneumonia; C. psittaci causes ornithosis or parrot fever
Term
What is the name of the anaerobic, box-car GPB?
Definition
Clostridium perfringens
Term
Which organism causes Pontiac fever & Legionnaire's disease?
Definition
Legionella species, typically pneumophila
Term
Which organism smells fruity?
Definition
Myroides odoratum (formally a part of Favobacterium)
Term
Which organisms fluorescence red?
Definition
Prevotella, Porphyromonas, & Veillonella
Term
Which organism appears green on TSA?
Definition
Pseudomonas aeruginosa
Term
Why does Pseudomonas aeruginosa appear green on TSA?
Definition
produces pyocyanin
Term
Which organisms are associated with ticks?
Definition
Rickettsia, Ehrlichia, Anaplasma, & Borrelia burgdorferi
Term
What distinguishes Streptobacillus moniliformis from Spirillium minus?
Definition
Streptobacillus is culturable; Spirillium is not
Term
What are the selective & differential media used to isolate Burkholderia cepacia?
Definition
BCSA & OFPBL agars
Term
How do the Burkholderia cepacia colonies appear on the BCSA & OFPBL agars?
Definition
produce yellow colonies
Term
What is the medium used to isolate Legionella?
Definition
BCYE
Term
If sexual abuse is suspected in a child, what is the method of choice for detecting Chlamydia trachomatis?
Definition
Culture; involves shell vial w/ McCoy cells
Term
What does BCYE contain that is required for Legionella growth?
Definition
Cysteine & iron
Term
Specimens requesting Chamydia trachomatis isolation & identification should contain __________ cells.
Definition
Epithelial
Term
What types of diseases are associated with Aeromonas species?
Definition
Extraintestinal and intestinal
Term
What two methods are used to detect Chlamydia trachomatis in shell vials?
Definition
Iodine stain for glycogen inclusion or DFA
Term
What organisms are used to perform the reverse CAMP test?
Definition
Known Gp B strep & suspected Clostridium perfringens isolate
Term
How does Bordetella pertussia appear on Bordet-Gengou?
Definition
Mercury drops
Term
What is the method of choice for detecting Chlamydia trachomatis in adults?
Definition
NAAT
Term
What is the method of choice for detecting Bordetella & Ehrlichia/Anaplasma?
Definition
PCR
Term
What type of loop should be used when working with anaerobes?
Definition
Platinum, stainless steel, or sterile wooden sticks
Term
How long are cultures held in the anaerobic chamber before they are read?
Definition
They can be read after 18-24 hours of incubation.
Term
How often should the catalyst be changed if using the older anaerobe jars?
Definition
Use fresh catalyst with each use; reactive by heating at 160 for two hours
Term
Legionella pneumophila is frequently detected in urine using ___________ __________ .
Definition
Antigen tests
Term
What type of specimens are acceptable for anaerobic cultures?
Definition
Aspirates & tissues
swabs are least desirable
Term
What is the selective & differential medium used to isolate & presumptive ID Bacteroides fragilis group?
Definition
Bacteroides bile esculin agar (BBE)
Term
What type of hemolysis is produced by Gardnerella on V agar or HBT agar?
Definition
Beta hemolysis (Human Blood)
Term
What type of hemolysis is produced by Gardnerella on BAP?
Definition
gamma hemolysis
Term
How does Bacteroides fragilis group appear on BBE?
Definition
Black
Term
What are the media used to isolate Bordetella?
Definition
Bordet-Gengou & charcoal blood agar (Regan-Lowe)
Term
What type of reaction is expected when Moraxella or Acinetobacter is inoculated to OF glucose media?
Definition
Both tubes are blue-green; open & closed (oil)
Term
What are the selective media used to isolate Campylobacter jejuni/coli?
Definition
Campy BAP or Skirrow agar
Term
At what temperature are the media incubated to isolate Campylobacter jejuni/coli?
Definition
42
Term
How does Pseudomonas aeruginosa use glucose?
Definition
Can only use in presence of oxygen
Term
What is the selective & differential medium used to isolate Clostridium difficile?
Definition
CCFA
Term
What are the sexual transmitted diseases caused by Chlamydia trachomatis that are commonly seen in the U.S.
Definition
Cervicitis, PID, & urethritis
Term
What amino acid has to be present in media to isolate Francisella tularensis?
Definition
Cystine or cysteine
Term
Which test has been considered the gold standard for detecting Clostridium difficile toxin?
Definition
Cytotoxicity test
Term
Which test is becoming the gold standard for detecting Clostridium difficile toxin?
Definition
PCR
Term
What disease is usually associated with Campylobacter jejuni & Campylobacter coli?
Definition
Diarrhea
Term
What disease is associated with the HACEK group?
Definition
Endocarditis
Term
What is the medium used to isolate Leptospira?
Definition
Fletcher's agar
Term
What is the recommanded medium used to isolate Francisella tularensis?
Definition
Glucose-cysteine blood agar
Term
What is the Gram stain result for the nonfermenters?
Definition
Gram negative bacilli
Term
What is the Gram stain result for Veillonella?
Definition
Gram negative cocci
Term
What is the Gram stain result for Bacteroides fragilis?
Definition
Gram negative rods
Term
What is the Gram stain result for Prevotella?
Definition
Gram negative rods
Term
What is the Gram stain result for Porphyromonas?
Definition
Gram negative rods
Term
What is the Gram stain result for Fusobacterium nucleatum?
Definition
Gram negative rods in fusiform shape
Term
What is the Gram stain result for Cardiobacterium hominis?
Definition
Gram negative rods in rosettes
Term
What is the Gram stain result for Campylobacter & Helicobacter?
Definition
Gram negative rods; S-shape, spirals, & seagull wings
Term
What is the Gram stain result for Vibro?
Definition
Gram negative rods; some may be curved
Term
What is the Gram stain result for Actinomyces?
Definition
Gram positive branching rods
Term
What is the Gram stain result for Peptostreptococcus?
Definition
Gram positive cocci
Term
What is the Gram stain result for Eubacterium & Bifidobacterium?
Definition
Gram positive rods
Term
What is the Gram stain result for Clostridium species?
Definition
Gram positive rods with spores
Term
What is the Gram stain result for Clostridium perfringens?
Definition
Gram positive rods, box-car shaped
Term
What is the Gram stain result for Propionibacterium?
Definition
Gram positive rods; looks like Chinese letters
Term
What is the Gram stain result for Gardnerella vaginalis?
Definition
Gram-variable coccobacilli
Term
Which organisms need a CO2 atmosphere for growth?
Definition
HACEK group, Capnocytophaga & Brucella
Term
What is the natural habitat for the HACEK organisms?
Definition
Human oral flora
Term
What is the natural habitat for Capnocytophaga species (not C. canimorsus/cyndoegmi)?
Definition
Human oral flora
Term
Name the diseases caused by Chlamydia trachomatis that effect newborns
Definition
Inclusion conjunctivitis & neonatal pneumonia
Term
What type of disease is associated with Plesiomonas shigelloides?
Definition
Intestinal are most common - diarrhea
Term
What is the appearance of nonfermenters on MAC/EMB?
Definition
colorless - Lactose negative
Term
What tests can be determined from egg yolk agar?
Definition
Lecithinase, lipase & proteolysis
Term
What is the selective & differential medium used to isolate Bacteroides & Prevotella (aids in detecting pigmented Prevotella)?
Definition
LKV or KVLB
Term
Name the STD caused by Chlamydia trachomatis that produces a regional lymphadenopathy
Definition
Lymphogranuloma venereum
Term
True or False:
Lymphogranuloma venereum is rarely seen in the U.S.
Definition
True
Term
What is the medium used to culture Streptobacillus moniliformis?
Definition
Media w/ body fluids (serum, ascites fluid, blood)
Term
What are the indicators that are used in anaerobic jars/chamber?
Definition
Methylene blue (blue in O2) & resazurin (pink in O2)
Term
What is the natural habitat for most of the anaerobes?
Definition
Near human mucosal surfaces (GI tract, RT, genital tract & skin)
Term
What type of nitrate reaction is produced by Acinetobacter?
Definition
Negative; red after addition of zinc (can not reduce nitrate)
Term
Interpret the following cytotoxicity test results:
Stool + antitoxin + tissue cells = No CPE
Stool + tissue cells = No CPE
Definition
No C. difficile toxin present
Term
Do all Campylobacter species require 42 for growth?
Definition
No, C. fetus grows at 37
Term
A doctor comes to the micro lab to pick-up anaerobic transport media. The anaerobe media has a pink color. It is acceptable for use?
Definition
NO, the pink color indicates the media contains O2
Term
The laboratory receives a shipment of thioglycollate (THIO) with vitamin K & hemin. Can the THIOs be used as soon as they are received?
Definition
No, the THIOs have to be boiled before use
Term
The Weyant & Associates charts divides the nonfermentors into 8 groups based on _______, ________, ________, & _________.
Definition
OF glucose, oxidase reaction, growth on MAC & motility
Term
What does a positive lipase look like?
Definition
Oil on water
Term
How should specimens for Chlamydia culture be transported?
Definition
On wet ice
Term
What does a positive lecithinase look like?
Definition
Opaque zone surrounding colonies
Term
Which reagent is used to perform the spot indole test?
Definition
Paradimethylaminocinnamaldehyde
Term
What is the anaerobic selective medium that inhibits facultative GNBs but allows the growth of facultative GPC & rods and as well as most anaerobes?
Definition
PEA-K
Term
What type of nitrate reaction is produced by enterics?
Definition
Positive; after addition of reagents A & B (nitrate to nitrite)
Term
What type of nitrate reaction is produced by Pseudomonas aeruginosa?
Definition
Positive; no color change after addition of zinc (nitrate to nitrogen gas)
Term
What test should be performed after biochemically identifying Vibrio cholerae?
Definition
Serogroup to detemine if 01or 0139
Term
What is the natural habitat for Chromobacterium violaceum?
Definition
Soil & water
Term
Describe the decontamination method used for Legionella specimens
Definition
Specimen + acid wash solution, left at RT for few minutes, then inoculated
Term
Which organisms are associated with rats?
Definition
Spirillium minor & Streptobacillus moniliformis
Term
How does the tech determine he/she is working with an anaerobe?
Definition
Subculture to CHOC (incubate CO2) & ANA-BAP (incubate ANA)
Term
Which reagents are used to perform the nitrate test?
Definition
Sulfanilic acid & dimethyl-alpha-naphthylamine
Term
What is the selective & differential medium used to isolate Vibrio?
Definition
TCBS agar
Term
How are Clostridium difficile and Clostridium botulinum infections usually diagnosed?
Definition
Toxin detection methods
Term
The isolation of Clostridium septicum from a blood culture is often associated with ____________ _____________ .
Definition
Underlying malignancy
Term
Name the disease caused by Ureaplasma.
Definition
Urethritis
Term
What are the media used to isolate Gardnerella vaginalis?
Definition
V agar or HBT agar
Term
Thoat/nasopharyngeal/sputum and GI (feces or bowel contents) specimens are unacceptable for anaerobic cultures. What other specimens are unacceptable for anaerobic cultures?
Definition
Voided urine & vaginal/cervical swabs
Term
Vibrio is usually transmitted through contaminated ________ & _________.
Definition
Water & seafood
Term
How does Clostridium difficile appear on CCFA?
Definition
Yellow colonies
Term
What type of reaction is expected when an enteric is inoculated to OF glucose media?
Definition
Yellow in both tubes; open & closed (oil)
Term
What type of reaction is expected when Pseudomonas aeruginosa is inoculated to OF glucose media?
Definition
Yellow in open tube; blue-green in closed tube (oil)
Term
What are other tests besides the cytotoxicity test used to detect Clostridium difficile toxin?
Definition
LA & EIA
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