Abstract
A selective culture medium for isolation of Pasteurella multocida was prepared by incorporating 2 mg of amikacin per liter, 4 mg of vancomycin per liter, and 4 mg of amphotericin B per liter into Mueller-Hinton blood agar. Use of this medium revealed the presence of P. multocida in the oropharynges of 19 of the 49 pig breeders who were examined.