Bovine Respiratory Disease Complex: Causative Organisms and Causative Viruses in Bronchoalveolar Regions of Introduced Fattening Cattle and Their Treatment Status after Introduction

HAYASHI Jun, ISHIKAWA Shingo, TSUMAGARI Keita, KURAMAE Tetsuro, HOBO Seiji

doi:10.12935/jvma.74.497

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導入肥育素牛の気管支肺胞領域に認められた牛呼吸器病症候群原因菌及び牛RSウイルスと導入後の治療状況
ドウニュウヒイクソギュウノキカンシハイホウリョウイキニミトメラレタギュウコキュウキビョウショウコウグンゲンインキンオヨビギュウ RS ウイルストドウニュウゴノチリョウジョウキョウ

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Abstract

<p>We investigated bovine respiratory disease complex by collecting bronchoalveolar lavage fluid (BALF) for bacteriological and virological examinations from fattening cattle following their introduction from market, and monitored their treatment records for any subsequent history of medical interventions. A cohort of 10 steers underwent BALF collection in April 2016, and Pasteurella multocida and Mycoplasma bovis were isolated in samples from eight and one animal, respectively, in bacteriology, and Respiratory Syncytial (RS) virus genetic material was detected in a sample from one animal in virology. A second cohort of 10 steers from the same herd underwent BALF collection in December 2016, and Pasteurella multocida and Mycoplasma bovis were isolated in samples from four and one animal, respectively, in bacteriology, and RS virus genetic material was detected in samples from all 10 animals in virology. Monitoring post-introduction treatment showed that the cohort with ubiquitously detected RS virus tended to require earlier medical interventions. These findings indicate the presence of pneumonia-causing bacteria or viruses in the bronchoalveolar region of cattle after introduction, which may be important for the development of preventive measures and treatment strategies.</p>

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Journal of the Japan Veterinary Medical Association

Journal of the Japan Veterinary Medical Association 74 (8), 497-502, 2021-08-20

Japan Veterinary Medical Association

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