Cooked M Medium, Modified (formerly Cooked Meat Medium, Modified) is recommended for isolation of Clostridium species in accordance with FDA BAM, 1998. The medium is used for the cultivation of Clostridium species, particularly Clostridium perfringens and Clostridium botulinum from food products. The medium can be used when the inoculums strength is low and also for maintenance of cultures. This allows the growth of mixed cultures of bacteria without affecting the performance of the other.