Description : A versatile medium primarily designed for the differentiation of enteric gram negative bacilli. Differentiation is on the basis of lactose fermentation with corresponding absorption of eosin and methylene blue. E.coli colonies exhibit a green metallic sheen by reflected light and dark purple centres by transmitted light. Enterobacter aerogens don‘t usually exhibit the metallic sheen, but exhibit dark brown centres by transmitted light. Non - Lactose fermenting colonies are translucent and Col