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26 Cards in this Set

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  • Back
What are the basic shapes of bacteria?
What are the two main Gram+ cocci bacteria?
Staph is catalase positive, Strep is cat. negative.
What other bacteria are cat. positive?
Pseudomonas(obligate aerobe)/
Listeria/Enterobacteriacae(facultative anerobes.
Name a clinically important Staph species.
Staph. epidermidis(coag. negative)(novobiocin sensitive)
Staph. saprophyticus(coag. negative)(novobiocin resistant)
How is sheep blood agar used to differentiate Streptococcus?
Hemolysis can be alpha, beta and gamma.
In gamma, there is no hemolysis.
Alpha, there is partial hemolysis(green color).
Beta- Complete hemolysis with central clearing due to hemolysin enzymes.
Give examples of bacteria that demonstrate such hemolysis or not.
Beta-Strep. pyogenes/Strep. agalactiae/S. aureus/Listeria monocytogenes.
Gamma-some Enterococci
What are Lancefield group antigens?
They are carbohydrates present in the cell walls of Strep species and serve as means of classification.
Name some bacteria associated with, Groups A,B,and D.
Gr. B-S. agalactiae
Gr. D- Strep. bovis
Enterococcus fecalis
Enterococci can grow in hypertonic saline and S. bovis cannot. TRUE/FALSE
What test can differentiate S. pyogenes and S. galactiae?
Bacitracin sensitivity.
S. pyogenes is Bacitracin sensitive and S. galactiae is Bacitracin resistant.
Name some clinically relevant G+ bacilli.
Corynebacterium, Listeria,Bacillus and Clostridium.
Bacillus and Clostridium form spores.
Bacillus is an obligate aerobe. Clostridium is an anerobe.
Is there a G+ bacillus that has metachromatic granules?
Yes. Corynebacterium diphtheriae. The granules are phosphate inclusions.
Nocardia and Actinomyces are two filamentous fungi-like G+ bacteria. TRUE/FALSE
What are the clinically relevant Gram - cocci bacteria?
Neisseria meningitidis, N. gonorrhea and Moraxella catarrhalis.
List 2 important distinctions between N. meningitidis and N. gonorrhea.
N. menin. has a capsule and therefore a vaccine. It reduces maltose.
N. gonorr. has no capsule.
List some clinically relevant Gram- bacilli bacteria.
Escherichia, Vibrio, Helicobacter, Campylobacter, Salmonella, Shigella.
Respiratory-Boredetella, Legionella, Haemophilus, Klebsiella, Pseudomonas.
Zoonotics-Franciscella, Brucella, Yersinia and Pasteurella.
Devise a mneumonic term to remember Enteric G_ bacilli bacteria.
Enterics are Very Hellish Company in the Stomach and Stool. (E. coli/ Vibrio/Helicobacter/Campylobacteria/Salmonella/Shigella.
List a similar mneumonic term for respiratory G_ bacilli.
Keep Breathing a Little Harder Please.
List a similar mneumonic term for zoonotic G_ bacilli.
Find Bacteria on Your Pets.
List 8 G_ bacilli that belong to Enterobacteriacae.
Enterobacteriaceeae are PESSKY Strains of bacteria.
What are the three antigens used for serotyping Enterobacteriaaceae?
O antigen(endotoxin cell wall component)
H antigen(flagella antigen)
K antigen(capsule antigen, virulence of Salmonella).
List some typical features that define Enterobacteriaaceae.
Gram Neg/glucose fermenting/lack cytochrome c in electron transport chain/facultative anerobes/catalase positive/can reduce nitrate to nitite.
Describe Pseudomonal characteristics.
Gram neg./nonglucose fermenting/have cytochrome c/obligate aerobe/cat. positive/ nitrite negative.
Which bacteria are urease positive?
H. pylori/Proteus/Ureaplasma/Nocardia and some strains of Pseudomonas and Klebsiella.
Urease degrades urea into ammonia and CO2.
List three common spirochetes.
Treponema, Borrelia and Leptospira.
Spirochetes are mobile.
What type of microscopy is employed to visualize spirochetes.
Drkfield, because they do not stain well. Silver or fluorescent can be used.