| LACTOSE FERMENTERS (LAC+) | NON-LACTOSE FERMENTERS (LAC-) | SLOW LACTOSE FERMENTERS |
| Utilizing lactose àproduce Acid àlow pH of agar < 6.8 à red/pink colonies | Cannot utilize lactose Use peptoneàform ammoniaàraises pH of agar àwhite/colorless colonies | ferment lactose slowly or weakly |
| Escherichia coli, Enterobacter Klebsiella | Salmonella, Proteus Shigella | Serratia Citrobacter. |
11/06/2011
Lactose & non-lactose fermenters
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