Evaluation of the antibiotic resistance of bacteria isolated from subclinical mastitis in cattle from dairy farms in Lurín, Lima
DOI:
https://doi.org/10.20453/stv.v10i1.4235Abstract
The objective of the study was to determine the antibiotic resistance of bacteria isolated from subclinical mastitis in four dairy farms in the district of Lurín, Lima, Peru, in 2017. 586 Holstein cows without clinical mastitis were evaluated during the summer season, using the California Mastitis Test (CMT). Milk samples were collected from the quarters that were positive for CMT (+, ++, +++) and proceeded to bacteriological culture (blood agar and McConkey agar) and biochemical tests were performed. Microbial resistance to eight antibiotics was evaluated using the Kyrbi-Bauer susceptibility test. We found 43.7% (256/586) of cows with subclinical mastitis and 12.4% (291/2344) affected mammary quarters. The most frequently isolated bacteria were Klebsiella oxytoca (20.2%), Enterobacter cloacae (12.1%), and Streptococcus agalactiae (9.1%). Antibiotic resistance will be demonstrated in K. oxytoca to penicillin, cephalothin, amikacin, streptomycin, tetracycline, gentamicin, cephalexin and enrofloxacin between 62.9% and 91.9%. The E. cloacae strains showed 100% resistance to penicillin and to cephalothin, amikacin, streptomycin, tetracycline, gentamicin, cephalexin and enrofloxacin between 86.5% and 97.3%. In S. agalactiae isolates, the observed resistance to penicillin, cephalothin, streptomycin, tetracycline, gentamicin, cephalexin, and enrofloxacin ranged from 10.7% to 82.1%. For amikacin, the sensitivity recorded was 100%.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
All articles published in Salud y Tecnología Veterinaria are under a Creative Commons Reconocimiento 4.0 International license.
The authors retain the copyright and grant the journal the right of first publication, with the work registered with the Creative Commons License, which allows third parties to use what is published whenever they mention the authorship of the work, and to the first publication in this magazine.
Authors can make other independent and additional contractual agreements for the non-exclusive distribution of the version published in this journal, provided they clearly indicate that the work was published in this journal.
The authors can file in the repository of their institution:
The research work or thesis of degree from which the published article derives.
The pre-print version: the version prior to peer review.
The Post-print version: final version after peer review.
The definitive version or final version created by the publisher for publication.
