Monsur Medium Base

Monsur Medium Base is recommended for selective isolation and differentiation of Vibrio chlolerae and other Vibrios from pathological samples. The colonies are often surrounded by a gelatin liquefaction halo, which becomes definite and clearly visible after 48 hours incubation. Potassium tellurite reacts as both selective and differential agent. It inhibits many gram-positive bacteria. Proteus may form grey centered colonies without a halo. After 24 hours Vibrios show small translucent colonies with a grey-black center and a turbid halo, at 48 hours and longer, colonies become black centered with a well defined halo.