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Bacteriological survey of bulk tank milk from dairy farms in Montero, Santa Cruz, Bolivia


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タイトル: Bacteriological survey of bulk tank milk from dairy farms in Montero, Santa Cruz, Bolivia
著者: Michimuko-Nagahara, Yu / Tamura, Yu / Koiwa, Masateru
発行日: 2018年10月26日
出版者: Veterinary World
引用: Veterinary World, 11(10), pp.1506-1509; 2018
抄録: Background and Aim: Recently, bacterial surveys for mastitis-causing pathogens in bulk tank milk (BTM) have been conducted in several countries worldwide. However, no such surveys have been reported from Bolivia. Therefore, the present study aimed to estimate the prevalence of mastitis pathogens in BTM from dairy farms in Montero, Santa Cruz, Bolivia. Materials and Methods: Between July 2016 and August 2017, a total of 43 BTM samples were collected from 3264 cows to determine bulk tank somatic cell counts (BTSCC) and identify mastitis-causing bacteria. BTSCC was classified as follows: <100×103, 100-500×103, 500-1000×103, and >1000×103 cells/mL. Results: Mastitis-causing pathogens identified by agar medium cultures included Bacillus spp., coagulase-negative staphylococci (CNS), coliforms, Staphylococcus aureus (SA), streptococci, and other species. The proportions of BTSCC of <100×103, 200-500×103, 500-1000×103, and >1000×103 cells/ml were 0%, 37%, 51%, and 12%, respectively. The proportions of coliforms, streptococci, CNS, Bacillus spp., SA, and others detected in BTM were 33%, 30%, 16%, 7%, 2%, and 16%, respectively. Conclusion: Although the herd prevalence of contagious mastitis-causing pathogens, such as SA, in BTM was low, increased BTSCC were identified in Montero, Santa Cruz, Bolivia.
キーワード: Bacterial survey / Bolivia / Bulk tank milk / Dairy farm / Mastitis
URI: http://hdl.handle.net/10069/38727
ISSN: 09728988
DOI: 10.14202/vetworld.2018.1506-1509
権利: Y. Michimuko-Nagahara, et al. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriatecredit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:120 学術雑誌論文

引用URI : http://hdl.handle.net/10069/38727

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