Fifty‐one isolates ofCorynebacterium equirecovered from pigs and horses belonging to two capsular serotypes were tested for susceptibility to antimicrobial agents. No clear differences were detected in sensitivity between isolates of different sources or serotypes. All isolates were sensitive to16 μg/ml, clindamycin 1–2 μg/ml, tobramycin ≤1 μg/ml, cephalothin 8–64 μg/ml, kanamycin 2–8 μg/ml, amikacin ≤1–2 μg/ml, penicillin 2–≤4 μg/ml, ampicillin 2–8 μg/ml, trimethoprim‐sulfa 4/76–32/608 μg/ml tetracycline 1–4