Cary & Blair Medium
Cary & Blair Medium is a semisolid medium employed in the transportation and preservation of samples such as stools and rectal swabs to prevent the rapid loss of viability of pathogenic enteric Gram-negative bacilli like Shigella spp., Salmonella spp., Yersinia spp., and Vibrio parahaemolyticus. The medium possesses low nutrient content to prevent replication of unwanted organisms, low red-ox potential to maintain viability of wanted bacilli, and high pH to prevent overgrowth of enteric pathogens like Escherichia coli and Enterobacter. Sodium Thyoglycollate is the antioxidant agent. Disodium Phospahte serves as pH buffer. Sodium and Calcium Chlorides supply essential electrolytes and maintain the osmotic balance.