CHROMOGENIC MM AGAR *

Chromogenic MM Agar was formulated by Miller and Mallison for specific isolation and detection of Salmonellae. This medium is superior to XLT4 Agar in supporting growth of Salmonella due to the presence of appropriate proportion of four sugars. Most differential and selective media are formulated with one or more sugars and pH indicators respectively. The utilization of sugars by organisms results in pH-changes. This is used as a means of distinguishing Salmonella from competing bacteria on the basis of colony colour. Salmonella usually are unable to ferment these sugars that support growth of competing bacteria. Thus other bacteria tend to overgrow Salmonellae, masking their presence.

for identi?cation and di?erentiation of Salmonella and non-Salmonella from water and clinical samples