Detection and Antimicrobial Resistance Profile of Enteropathogenic (EPEC) and Shigatoxigenic Escherichia coli (STEC) in Conventional and Organic Broiler Chickens

Enteropatogenic Escherichia coli (EPEC) and shigatoxigenic E. (STEC), are generally poultry product isolate can cause serious human infections. Many strains may become resistant to various antimicrobials, which hinder the treatment of bacterial diseases. Organic farming seeks avoid selection frequency antimicrobial-resistant bacteria. This study aims verify resistance EPEC STEC from organic conventional (industrial) broiler isolates antimicrobials. All were submitted disk diffusion test with tetracycline, gentamicin, enrofloxacin, ceftriaxone amoxicillin + clavulanate (TET, GEN, ENO, CTX, AMC) PCR detect specific virulence genes for STEC. A total 297 isolated, 213 conventional. In broiler, 84 isolated. The five antimicrobials tested: TET 48.82% (104/213), ENO 28.17% (60/213), CTX 15.49% (33/213), GEN 14.55% (31/213), AMC 7.04% (15/213), 9.86% (21/213) considered multidrug-resistant. chicken four 35.7% (30/84), 9.5% (8/84), 2.4% (2/84), 4.8% (4/84). Of isolates, only 1.2% (1/84) was No found in samples. multidrug characterized 9.52% (2/21) 4.76% (1/21) demonstrated absence broilers carcasses a lower multiresistant compared breeding.