Selenite Cystine Broth is used as a selective enrichment medium for the isolation of Salmonella from feces, foods, water and other materials of sanitary importance.

Principles Peptone provides amino acids and other nitrogenous substances. Lactose provides a source of energy, and sodium phosphate buffers the medium to maintain the pH. Sodium selenite inhibits gram-positive bacteria and suppresses the growth of most gram negative enterics other than Salmonella. L-cystine is incorporated to improve the recovery of Salmonella.

• BD Difco Selenite Cystine Broth Technical Data Sheet