Bacterial Isolation and Antimicrobial Susceptibility from Bronchoalveolar Lavage Fluids of Calves with Severe Pneumonia

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  • KURAMAE Tetsuro
    Kuramae Animal Clinic United Graduate School of Veterinary Science, Yamaguchi University
  • ISHIKAWA Shingo
    United Graduate School of Veterinary Science, Yamaguchi University Joint Faculty of Veterinary Medicine, Kagoshima University
  • HAYASHI Jun
    United Graduate School of Veterinary Science, Yamaguchi University Miyazaki Agricultural Mutual Aid Association
  • TSUMAGARI Keita
    United Graduate School of Veterinary Science, Yamaguchi University Soo Agricultural Mutual Aid Association
  • OTOMARU Konosuke
    United Graduate School of Veterinary Science, Yamaguchi University Joint Faculty of Veterinary Medicine, Kagoshima University
  • HOBO Seiji
    United Graduate School of Veterinary Science, Yamaguchi University Joint Faculty of Veterinary Medicine, Kagoshima University

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  • 重症慢性肺炎罹患牛の気管支肺胞洗浄液からの細菌分離と薬剤感受性
  • ジュウショウ マンセイ ハイエンリカンギュウ ノ キカンシ ハイホウセンジョウエキ カラ ノ サイキン ブンリ ト ヤクザイ カンジュセイ

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Abstract

<p>In this study, nasopharyngeal swabs (Swab) and bronchoalveolar lavage fluids (BALF) were collected from 50 Japanese black cattle diagnosed with severe chronic pneumonia, and identification of the causative bacteria of pneumonia and its antibiotic susceptibilities were investigated. Mycoplasma bovis and Pasteurella multocida were mainly isolated from Swab and BALF. However, the rates at which the same bacterial species were isolated from both specimens in the same cow were relatively low. In addition, M. bovis and P. multocida isolated from BALF were mainly sensitive to fluoroquinolones, but the antibiotic susceptibilities of the same two species isolated from Swab were low. From the above, M. bovis and P. multocida were mainly isolated from the nasopharyngeal area and bronchoalveolar area of cattle with severe chronic pneumonia, but the antibiotic susceptibility differs depending on the collection site, even if the same bacterial species is a possibility. It seems necessary to be careful about estimating the pneumonia causing bacteria by Swab in calves with severe pneumonia.</p>

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