| A | B |
|---|
| Similar biochemically to Salmonella but lysine neg and ONPG pos | Citrobacter |
| Sorbitol neg and MUG neg strain of E. coli | E. coli 0157:H7 |
| Produces Hemolytic Uremic Syndrome | E. coli 0157:H7 |
| causes NB infections | E. coli, enteropathogenic strain |
| Green sheen on EMB, IMViC++- - | E. coli |
| produces watery stool due to travelers diarrhea similar to Vibrio | E. coli, enterotoxigenic strain |
| A/A++, motile, ornithine decarboxylation pos, - -++ for IMViC | Enterobacter |
| A/A++, varying motility, neg citrate, pos indole, urease neg | Escherichia |
| Causes pneumonia, IMViC- -++, very mucoid colonies due to capsule | Kleb pneumoniae |
| Friedlander's | Klebsiella |
| Non-motile, A/A with gas | Klebsiella |
| Phenylalanine deaminase pos, urea pos, H2S neg, citrate neg | Morganella |
| Swarms | Proteus |
| H2S pos, very pos urea, deaminates tryptophane, indole pos | Proteus vulgaris |
| Lactose fermentation neg but TSI A/A due to sucrose fermentation, H2S pos | Proteus vulgaris |
| PDA and TDA pos, H2S neg, citrate pos | Providencia |
| Species of Shigella that is most commonly isolated | S. sonnei |
| Species of Shigella that eventually may ferment lactose | S. sonnei |
| Species of Salmonella that produces only a small amount of H2S | S. typhi |
| Species of Salmonella that causes typhoid fever | S. typhi |
| K/A with gas and H2S, urea neg, lysine pos | Salmonella |
| Serotyped by Kauffman-White scheme | Salmonella |
| DNAse pos | Serratia |
| Some colonies may produce brick red pigment | Serratia |
| Clear on MacConkey, all species non-motile | Shigella |
| Non-motile, K/A, no H2S, no gas | Shigella |
| Mimics appendicitis, KIA is K/A and TSI is A/A | Y. enterocolitica |
| Grows better at RT than 37degrees, bipolar staining, CIN selective media | Yersinia |
| Lactose fermentation neg but TSI A/A due to sucrose fermentation, H2S negative | Yersinia enterocolitica |
| Causes plague due to V and W antigens | Yersinia pestis |
