negative lactose
positive lactose
Escherichia coli
Proteus vulgaris
Proteus mirabilis
Serratia marcenscens
Enterobacter aerogenes
Klebsiella pneumoniae
| |
|
Positive | Negative
| Pseudomonas | Enterobacteriaciae
| | | |
| Growth on MacConkey agar | negative lactose Growth on MacConkey agar | positive lactose | | | | |
| H2S positive | H2S negative | Indole positive | Escherichia coli Indole negative
| | | | | | | | |
| Indole positive | Proteus vulgaris Indole negative | Proteus mirabilis Citrate positive | Serratia marcenscens | | Urea negative | Enterobacter aerogenes Urea positive | Klebsiella pneumoniae | |||||||||||||||||||||||||||||||||||||||||||||||||||||||