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- Title
SUSCEPTIBILIDAD ANTIMICROBIANA DE Staphylococcus aureus AISLADOS DE VACAS HOLSTEIN PORTADORAS DE MASTITIS SUBCLÍNICA EN LA PROVINCIA DE BUENOS AIRES, ARGENTINA.
- Authors
F., Aliverti; M., Lucas; D., Buldain; L., Marchetti; N., Mestorino
- Abstract
Bovine mastitis is the disease with the greatest economic impact on dairy farms worldwide. Staphylococcus aureus is one of the main culprits, capable of surviving intracellularly and developing different resistance mechanisms. The objective of the present study was to determine the susceptibility to antimicrobials of S. aureus strains isolated from milk samples obtained from Holstein cows in production with subclinical mastitis. A total of 44 Staphylococcus aureus strains were analyzed by disk diffusion on agar (DDA). Oxacillin, cefoxitin, clindamycin, erythromycin, rifampicin, rifaximin, and cefacetril/rifaximin discs were used. 2.27% strains were resistant to clindamycin and erythromycin. 95.45% presented sensitivity to all the antibiotics tested. 17 colonies were isolated from the inhibition halos produced by oxacillin and rifampicin, of which 10 were confirmed as S. aureus strains. From these, a second DDA test was performed. Antibiotic resistance to erythromycin was 20%, and 70% for rifampicin and rifaximin. Knowing the susceptibility of the microorganisms that produce mastitis is essential to achieve effective antibiotic therapy; thus avoiding multi-resistance due to the indiscriminate use of antibiotics in the dairy farms.
- Publication
Veterinaria Cuyana, 2021, Vol 15, p5
- ISSN
1850-0900
- Publication type
Article