Vet World Vol.11 October-2018 Article-23
Research Article
Veterinary World, 11(10): 1506-1509
https://doi.org/10.14202/vetworld.2018.1506-1509
Bacteriological survey of bulk tank milk from dairy farms in Montero, Santa Cruz, Bolivia
2. Department of Immunogenetics, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan.
3. Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan.
4. Veterinary Teaching Hospital, Azabu University, Sagamihara, Kanagawa, Japan.
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. Keywords: bacterial survey, Bolivia, bulk tank milk, dairy farm, mastitis.
Keywords: bacterial survey, Bolivia, bulk tank milk, dairy farm, mastitis.
How to cite this article: Michimuko-Nagahara Y, Tamura Y, Koiwa M (2018) Bacteriological survey of bulk tank milk from dairy farms in Montero, Santa Cruz, Bolivia, Veterinary World, 11(10): 1506-1509.
Received: 21-05-2018 Accepted: 14-09-2018 Published online: 26-10-2018
Corresponding author: Yu Tamura E-mail: tamura@azabu-u.ac.jp
DOI: 10.14202/vetworld.2018.1506-1509
Copyright: Michimuko-Nagahara, et al. This article is an open access article 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 appropriate credit 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.