5 terms

lactose fermentation

How to perform test?
inoculate lactose broth with inoculating loop
Properly it test for
bacterias ability to ferment lactose
Media and reagents used:
lactose broth contains beef extract, gelatin peptone, and lactose. A phenol red indicator is added to indicate acid production from fermentation
pos. results
yellow after several drop of phenol red is added (indicating lactose fermentation)
neg results
reddish color