Survey on mycoplasmal pneumonia of swien in Youngnam area and antimicrobial susceptibility of Mycoplasma hyopneumoniae isolated from Slaughter pigs

Cho, K.H.; Choi, J.S.; Kim, B.H. . College of Veterinary Medicine

Survey on mycoplasmal pneumonia of swien in Youngnam area and antimicrobial susceptibility of Mycoplasma hyopneumoniae isolated from Slaughter pigs

1999

Cho, K.H. | Choi, J.S. | Kim, B.H. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)

The present study was carried out to investigate the prevalence of mycoplasmal pneumonia of slaughter pigs in Youngnam area during the period from 1995 to 1997. The prevalence and pathomorphology of gross lung lesions were studied from 682 slaughter pigs in 8 swine herds. Gross lesions of pneumonia were recorede in the lungs of 442(64.8%), from 367 out of them(83.0%) were diagnosed as mycoplasmal pneumonia. Microbiological examination was performed with 197 lungs with gross lesions of mycoplasmal pneumonia of slaughter pigs from 8 differentswine herds. M hyopneumoniae, P multocida, A pleuropneumoniae, Streptococcus spp, Corynebacterium spp, and H parasuis were detected in 24.4%, 48.2%, 2.5%, 11.2%, 3.6%, and 1.0% of the pneumonic lungs, respectively. A total of 48 strains of M hyopneumoniae was investigated for thier in vitro susceptibility to antibiotics. Among the drugs tested, lincomycin, oxytetracycline, tiamulin and tylosin showed the high activity in minimal inhibitory concentration(MIC) of 0.04-5 micro gram/ml while erythromycin showed low activity in MIC values(1.25~40micro gram/ml).

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