Drug sensitivity of microbial agents isolated from cows with subclinical and clinical mastitis to some antibiotics
2001
Bozhkova, G. (Post-Graduate Training Centre, Sofia (Bulgaria)) | Andreeva, P. | Petkov, Y.
Pathogenic microbial strains, isolated from cows with clinical and subclinical mastitis were shown to have a various sensitivity to some antibiotics. The combined in vitro application of gentamicin and lincomycin resulted in relatively low fractional inhibitory concentration (FIC) indexes in a part of Staphylococcus aureus and Streptococcus agalactiae strains, evidencing the presence of a synergic effect. S. aureus, Streptococcus epidermidis, S. dysgalactiae, S. uberis and Escherichia coli were sensitive to gentamicin (90.4-100%), streptomycin (66.6-100%), lincomycin (100%; 33.3% for E. coli), ampicillin (33.3-100%); penicillin (16.1-100%). S. agalactiae and Actinomyces pyogenes strains were shown to be fully sensitive to gentamicin and lincomycin (100%).
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