Abstract
The sensitivity of 80 E. coli strains isolated from canine rectal swabs to antimicrobial drugs was tested in this study. The results showed 47.5% resistance to ampicillin, 18.7% to the combination amoxicillin/clavulanic acid and 6.2% to cephalothin. The percentage of E. coli isolates resistant to tetracycline was 26.2%, to ciprofloxacin 12.5%, and to gentamicin 10%. The resistance to cefotaxime and ceftazidime was the lowest (1.2% and 2.5% respectively). Determined MIC90 of ampicillin were 16 μg/mL, and of amoxicillin/clavulanic acid and cephalothin 8 μg/mL. The main resistance genotype of isolates to tested beta-lactams was associated with presence of blaTEM.
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