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GPB and GNB Cheat Sheet (DRAFT) by

GPB and GNB

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Listeria monocy­tog­enes

Clinical signif­icance
- Neonatal sepsis and meningitis
- Virulent foodborne pathogen
- Can be fatal
Catalase Reaction
Catalase positive
Colony Morphology
Grows on CA; Nutrient agar; Brain-­heart infusion; thiogl­ycolate broth
- small, round, smooth, transl­ucent with little hemolysis (resembles S. algala­ctiae)
Cellular Morphology
Gram positive bacilli; often in stacks
Tests of Signif­icance
CAMP positive; Catalase Positive; Tumbling Motility; Umbrella Motility; Esculin Positive
Gram-p­ositive bacilli
    

Coryn­eba­cte­rium dipht­heriae

Clinical signif­icance
Causes diphtheria
Catalase Reaction
Catalase Positive
Selective Medium
Loeffler's Serum; Hoyle's Tellurite