Organism Differentiation Flashcards
Escherichia coli positives
Indole
Lactose
H2S
Oxidase
Other
Indole positive
Lactose positive
E+
Motile
Serotyping O,H and K
May be beta hemolytic
EHEC (Shiga Toxin)
Klebsiella pneumonia positives
Indole
Lactose
H2S
Oxidase
Other
Lactose
E+
Non-Motile
Serologic- O and K antigens
Citrobacter freundii positives
Indole
Lactose
H2S
Oxidase
Other
Lactose (late)
H2S
E+
Motile
Proteus Mirabilis positives
Indole
Lactose
H2S
Oxidase
Other
H2S
E+
Motile
coccobacilli
BAP swarming
LIA-R w/ H2S
Shigella sonnei positives
Indole
Lactose
H2S
Oxidase
Other
All Negative
E+
Non-Motile
Serotyping O
Shiga toxin
Salmonella enteritidis positives
Indole
Lactose
H2S
Oxidase
Other
H2S
E+
Motile
Serotyping O,Vi,H
Yersinia enterocolitica positives
Indole
Lactose
H2S
Oxidase
Other
All Negative
E+
Non-Motile
CIN- bullseye colonies
Pseudomonas aeruginosa positives
Indole
Lactose
H2S
Oxidase
Other
Oxidase
Fruity/grape odor
Metallic sheen (BA)
Flat and spreading
Pigment
**Can grow at 42 degrees
Acinetobacter spp. positives
Indole
Lactose
H2S
Oxidase
Other
All negative
Coccobacilli
Stenotrophomonas maltrophilia positives
Indole
Lactose
H2S
Oxidase
Other
All negative
ammonia smell
Vibro cholearae positives Indole Lactose H2S Oxidase Other
Indole
Oxidase
Curved rods
Growth NaCl
API
Serotyping
Eikenella corrodens
Indole
Lactose
H2S
Oxidase
Other
**Oxidase **
Bleach smell
Corroding/pitting of Agar
NO GROWTH on MAC
Pasturella mulcocida
Indole
Lactose
H2S
Oxidase
Other
Indole
Oxidase
H2S
MAC- no growth
BA- gray, non-hemolytic
Ovoid gran neg rods (Bi-polar, pleomorphic)
Legionella pneumophilia
Indole
Lactose
H2S
Oxidase
Other
Oxidase
(indole/H2S unknown)
THIN gram neg rods (faint, not usually seen on gram stain)
Small grey glistening colonies, “cut glass”
