Gram Stain
Gram Negative (-ve)
Morphology?
Bacillus
Ferments Lactose?
Yes
Liquefies Gelatin?
Negative
Coagulase Test?
Negative
E. coli
Positive
Positive
No
Liquefies Gelatin?
Positive
Coagulase Test?
Negative
P. aeruginosa
Postive
Negative
Coccus
Gram Positive (+ve)
Morphology?
Coccus
Ferments Lactose?
Yes
Liquefies Gelatin?
Positive
Coagulase Test?
Positive
S. aureus
Negative
Negative
Coagulase Test?
Negative
S. epidermidis
Positive
No
Bacillus