Antibiotic Susceptibility of Microbial Isolates from Nasal Swabs of Bovine Pneumonic Cases

DOI JASI Web Site 6 Citations 21 References
  • KATOH Toshihide
    Veterinary Clinical Training Center, Yamagata Prefectural Federation of Agricultural Mutual Aid Associations
  • KOYA Masato
    山形県農業共済連最上家畜診療所
  • WATANABE Eiji
    Veterinary Clinical Training Center, Yamagata Prefectural Federation of Agricultural Mutual Aid Associations
  • SAKAI Jun-ichi
    Veterinary Clinical Training Center, Yamagata Prefectural Federation of Agricultural Mutual Aid Associations
  • OGATA Yoshimi
    山形県農業共済連置賜家畜診療所
  • HIKINUMA Tooru
    Veterinary Clinical Training Center, Yamagata Prefectural Federation of Agricultural Mutual Aid Associations

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Other Title
  • 肺炎罹患牛の鼻汁由来細菌およびマイコプラズマの薬剤感受性
  • ハイエン リカン ウシ ノ ビジュウ ユライ サイキン オヨビ マイコプラズマ

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Description

The nasal swabs from bovine pneumonic cases were bacteriologically examined from 1986 to 1995. One hundred and forty isolates of Pasteurella multocida, 23 of P. haemolytica, 137 of Mycoplasma bovis, 76 of M. bovirhinis and 104 of Ureaplasma diversum were obtained from 271 out of 329 (82.4%) cases. Of 271 cases, 105 (38.7%) were of mixed infection with Pasteurella and Mycoplasma and/or U. diversum. The Pasteurella isolates had high sensitivity to enrofloxacin (ERFX) and ampicillin, showing a minimum 50% inhibitory concentration (MIC50) of≤0.10μg/ml. Mycoplasmas had high sensitivity to ERFX, tylosin and lincomycin, showing an MIC50 of≤0.78μg/ml. On the other hand, susceptibility of Pasteurella and Mycoplasma to thiamphenicol and oxytetracycline was extensively variable, suggesting common distribution of the resistant strains to these drugs.

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