Prevalence of Antibiotic Resistance and β-lactamase Production by Bacteria Isolated from Cases of Bovine Mastitis

Distribution of R-factor and β-lactamase Production in Ampicillin Resistant Strains of Enterobacteriaceae Isolated from Equines

“…The increased prevalance of resistant strains to ampicillin and chloramphenicol appear to be neither because of therapy nor their incorporation into ration. It was probably due to the selection of strains from poultry and other animal farms (Nazer and Tavakoli, 1994). An association between the routine use of antibiotics for prophylaxis and increased prevalence of Fu .…”