屠宰前鸡、猪源大肠杆菌耐药性调查

Abstract

Abstract: The study was aimed to determine the antimicrobial susceptibility of E.coli strains to common antimicrobials, so as to evaluate the potential food safety.E.coli strains were isolated from chicken and swine fecal samples which were randomly collected from pig and poultry markets in Guangzhou. Antimicrobial susceptibility of 15 antimicrobial agents was determined by agar dilution method. A total of 606 and 125 E.coli strains were isolated from 658 swine samples and 133 chicken samples, respectively. 731 E.coli stains all displayed a different degree of resistance to 15 antimicrobials and showed multiple-antibiotic resistant phenotype. The resistance rates of sulfamethoxazole and tetracycline were over 90.0%. There was a relative low frequency of resistance to cefoxitin, colistin and amikacin among these isolates, and resistance rates were less than 3%. Chicken isolates showed significantly higher frequency of resistance to cefotaxime, ceftriaxone, neomycin, amikacin, nalidixic acid and ciprofloxacin than pig isolates(P＜0.05). About 97.60% chicken isolates and 94.72% pig isolates showed resistant to more than 3 kinds of antimicrobials. Antibiotic resistance of E.coil recovered from pigs and chickens at slaughter was serious, most of them showed multiple resistance phenotypes. It indicated that these resistant bacteria carried by food animals at slaughter might pose great threat to food safety and human healthy.

Key words:

pig; chicken; E. coli; resistance; multidrug resistance

RAO Li-li, LUO Dong-mei, CHEN Pei-ling, CHEN Xiao-jie, HE Dan-dan, YUAN Qi-ming, ZENG Li, LIU Jian-hua. Surveillance of Antibiotic Resistance of E.coli Isolated from Chickens and Pigs at Slaughter[J]. .

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Surveillance of Antibiotic Resistance of E.coli Isolated from Chickens and Pigs at Slaughter

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