Antimicrobial resistance and frequency of Bla∧TEM in Escherichia coli isolated from non-diarrheic and diarrheic piglets
2012
Byun, J.W., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Kim, H.Y., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Jung, B.Y., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Bae, Y.C., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Lee, W.K., Chungbuk National University, Cheongju, Republic of Korea
Antimicrobial resistance is one of the most concerns in pig industry. Escherichia (E.) coli have been used for the indicator to monitor the antimicrobial resistance. In this study, 321 E. coli from diarrheic and non-diarrheic piglets were tested for antimicrobial resistance and frequency of Bla∧TEM. In non-diarrheic piglets, they were resistant to oxytetracycline (93%), streptomycin (92%) and sulfadiazine (90%) but susceptible to ceftiofur (99%), colistin (97%), and enrofloxacin (82%). The isolates from diarrheic piglets were resistant to enrofloxacin (72.9%), ceftiofur (17.6%), and colistin (11.3%), whereas the resistance was 1%, 18% and 3% in case of non-diarrheic piglets, respectively. The resistance for amoxicillin/clavulanic acid (54.1%) and ceftiofur (22%) was high in isolates from post-weaning piglets. The resistance for colistin was 15.2% in nursery piglets. Seventy-three percent of isolates from diarrheic piglets showed high multidrug resistance profile (more than 13 antimicrobials) compared to those from non-diarrheic pigs in which 71% of isolates showed moderate multidrug resistance profile (7 to 12 antimicrobials). The frequency of Bla∧TEM in E. coli from non-diarrheic and diarrheic piglets was 57% and 69%, respectively. The results might provide the basic knowledge to establish the strategies for treatment and reduce antibiotic resistance of E. coli in piglets.
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