Susceptibility to Chemotherapeutics of Haemophilus parahaemolyticus Isolated from Swine Pleuropneumonia

Abstract

Nine strains of Haemophilus parehaemolyticus were isolated from 9 swine affected with pleuropneumonia on 3 hog farms in Niigata Prefecture, and examined for MIC to chemotherapeutics. They were very highly susceptible to 10 agents, including streptomycin, kanamycin, tetracyclin, and chloramphenicol, showing an MIC of 0.75-0.1 mcg/ml. Their MIC was within a therapeutically effective range of 12.5-1.5 mcg/ml in the case of 9 agents, including penicillin G, leucomycin, and tylosin.