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With the development of the pigeon industry in Qingdao, more attention is paid to scientific breeding and precise treatment. This study isolated and identified Escherichia coli from pigeons in Qingdao to determine their susceptibility to 18 antibiotics. The PCR method was used to detect the prevalence of Extended-Spectrum β-Lactamase genes, carbapenem resistance genes, 16S rRNA methylase genes and plasmid-mediated colistin resistance genes in the isolates. The results showed that Escherichia coli isolated from pigeons in Qingdao were the most resistant to tetracycline, followed by ampicillin, conventional cyclosporines, quinolones, cephalosporins, and aminoglycosides. No isolates were found to be resistant to amikacin, meropenem, colistin, tigecycline, and fosfomycin. The resistance to some antibiotics (ampicillin, tetracycline, and florfenicol) and the muti-drug resistance of Escherichia coli from meat pigeons were both higher than those from homing and ornamental pigeons. A total of 24.8% of the isolates showed multi-drug resistance, especially triple-drug resistance. Two isolates were found to carry ESBLs resistance genes. Hopefully, this study will provide a certain scientific basis for the clinical medication of pigeon colibacillosis, helping to prevent antimicrobial resistance transmission of Escherichia coli among different host animals and humans and maintain public health safety in Qingdao.

Antimicrobial Resistance Analysis of Escherichia coli Isolated from Pigeons in Qingdao, Shandong Province, China