"WardsSci000189"

Used to determine if bacteria produce extracellular enzymes to catalyze the hydrolysis of starch. Organisms that produce a starch hydrolyzing enzyme will display a clear zone around the area of growth while other areas of the agar containing starch will turn blue-black.

A medium helpful in differentiation of the enterobacteriaceae. Simmons citrate agar test for organisms that are able to utilize citrate as a carbon source.