Microbiology

Antibiotics/Susceptibility

100

What is the course of action for Beta-Lactam antibiotics? (ex. Penicillin)

Inhibits cell wall synthesis

200

What is the standard concentration of McFarland for susceptibility testing?

0.5 McFarland

300

What is the term used for the lowest concentration of a drug that prevents the growth of an organism?

MIC (minimum inhibitory concentration)

400

What gene is detected for MRSA in molecular tests?

MecA gene

500

What is the course of action for Aminoglycosides? (ex. Gentamycin)

Inhibits protein synthesis

Agar

100

Lowenstein-Jenson agar is used to isolate....

Mycobacterium species

200

Thiosulfate Citrate-Bile Salts Agar (TCBS) is used to isolate....

Vibrio species

300

Thayer-Martin Agar is used to isolate...

N. gonorrhoeae and N. meningitidis

400

Bordet-Gengou agar is used to isolate...

Bordetella pertussis

500

Cycloserine-Cefoxitin Fructose agar (CCFA) is used to isolate...

C. difficile

Staph/Strep

100

This organism causes UTI's in sexually active young women and is resistant to novobiocin.

S. saprophyticus

200

What Staph species causes scalded skin syndrome?

S. aureus

300

Which strep species is CAMP pos and hippurate hydrolysis pos?

S. agalactiae (GBS)

400

Which strep species caused Rheumatic Fever?

S. pyogenes (GAS)

500

What Staphylococcus species is PYR positive?

S. lugdunensis

GPB

100

"Clue cells" are squamous epithelial cells covered in what bacteria?

Gardnerella vaginalis

200

This organism has "umbrella-like" motility at room temperature but not at 37 degrees C. 

Listeria monocytogenes 

300

What is the purpose of 10% KOH for a wet prep?

It dissolves hair, skin cells, and nail debris to release trapped fungus.

400

Which GPB has a palisade or "Chinese letter" arrangement on a gram stain?

Corynebacterium diphtheriae

500

Which organism causes food poisoning from fried rice?

Bacillus cereus

GNB

100

What biochemical test is used to differentiate between P. vulgaris and P. mirabilis?

Indole

200

Bubonic plague is caused by what organism?

Yersinia pestis

300

What TSI reaction does Proteus produce?

K/A + H2S

400

What causes Klebsiella to be mucoid on media?

Capsule

500

Shigella flexneri belongs to group A, B, C, or D?

Group B    (Dirty Fingers Bring Shigella)

dysenteriae, flexneri, boydii, sonnei