m-Enterocpccus Agar is a selective agar medium used in membrane filtration procedure or in direct plating for the detection and enumeration of enterococci in water, food or other materials. Quality Control Specifications: Homogeneous powder, free-flowing and light beige. Visually the prepared medium is clear to slightly hazy and light to medium pinkish-beige. Expected cultural response after 18-48 hours at 35°C. m-Enterococcus Agar is an improved agar which was found to be superior in the isolation, selectivity and enumeration of enterococci found in heavily polluted waters. Using m-Enterococcus Agar, higher counts for enterococci were obtained when compared to the standard MPN procedures. The addition of 0.2% sodium carbonate and 0.05% Tween 80 to this medium gave better results than 15 other culture media used for the direct plating of Enterococcus. Testing Results: Enterococcus faecalis (ATCC 19433): Growth, pink-red colonies. Escherichia coli (ATCC 25922): Inhibited.