| Test |
E.coli |
A.aerogenes |
| Indole |
Indole is produced from trytophan(+) |
Not produced (-) |
| Methyl Red |
Methylred is turned red, which means a pH of below 4.5 is produced(+) |
Methylred remains yellow,which less acid is produced (-) |
| Voges-Proskauer |
Acetylmethly carbinol is not produced in glucose-peptone medium(-) |
Acetyl methly carbinol is produced(+) |
| Citrate |
Citrate as the sole source of carbon does not support growth(-) |
support the growth(+) |
