Abstract
A region-wide survey was conducted in the tropical area of Tierra Caliente, State of Guerrero, Mexico to estimate the prevalence of subclinical bovine mastitis (SCM), distribution of mastitis pathogens, and in vitro antimicrobial susceptibility of different mastitis pathogens in dairy farms. In total, 1036 quarter milk samples were obtained from 259 cows at 87 different dairy farms. Collected quarter milk samples were submitted for California Mastitis Test (CMT), bacteriological examination, and testing for antimicrobial susceptibility. Overall prevalence of SCM in the studied area was 20.5 %. Prevalence in the different regions was as follows: 28 % in Arcelia municipality, 21 % in Tlalchapa municipality, 19.4 % in Pungarabato municipality, and 14.3 % in Finch Cutzamala municipality. Of all positive isolates, 97.5 % were Gram-negative bacteria. Moreover, of all positive isolates, 37.5 % were Proteus vulgaris, 25 % Salmonella spp., 12.5 % Enterobacter aerogenes, and 10 % Escherichia coli. Klebsiella pneumonia and E. coli were sensitive for netilmicin antimicrobial. However, E. coli was sensitive for pefloxacin and gentamicin with a sensitivity for pefloxacin for E. aerogenes, while Staphylococci were sensitive for gentamicin and dicloxacillin. It could be concluded that practices such as the implementation of mastitis control programs, improved milking hygiene together with an intramammary treatment with netilmicin, pefloxacin, and gentamicin antimicrobials should be considered for mastitis prevention in the study area of Tierra Caliente, in the tropical area of Guerrero, Mexico.
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Abbreviations
- CMT:
-
California Mastitis Test
- I:
-
Intermediate resistance
- R:
-
Resistant
- S:
-
Sensitive
- SCM:
-
Subclinical bovine mastitis
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Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the official Mexican standard of animals care (NOM-051-ZOO-1995).
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All authors declare that there are no present or potential conflicts of interest among the authors and other people or organizations that could inappropriately bias their work.
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Informed consent was obtained from all individual participants included in the study.
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Olivares-Pérez, J., Kholif, A.E., Rojas-Hernández, S. et al. Prevalence of bovine subclinical mastitis, its etiology and diagnosis of antibiotic resistance of dairy farms in four municipalities of a tropical region of Mexico. Trop Anim Health Prod 47, 1497–1504 (2015). https://doi.org/10.1007/s11250-015-0890-8
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DOI: https://doi.org/10.1007/s11250-015-0890-8