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Prevalence and Persistence of Ceftiofur-Resistant Escherichia coli in A Chicken Layer Breeding Program.


ABSTRACT: We determined the longitudinal persistence of ceftiofur-resistant Escherichia coli from a chicken breeding farm in China. A total of 150 samples were collected from 5 breeding periods in a flock of layer hens, and the prevalence of ceftiofur-resistant E. coli fluctuated across the 5 chicken breeding stages: eggs, 3.33%; growing period, 100%; early laying period, 36.7%; peak laying period, 66.7% and late laying period, 80%. The most prevalent ceftiofur resistance genes were blaCTX-M-55, blaCMY and blaNDM, and ST101 was the most prevalent and persistent sequence type across the breeding periods. Our results indicated that this breeder flock was heavily contaminated by ST101 ceftiofur-resistant E. coli and that its presence should be intensively monitored on chicken farms.

SUBMITTER: Liao M 

PROVIDER: S-EPMC9817529 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature

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Prevalence and Persistence of Ceftiofur-Resistant <i>Escherichia coli</i> in A Chicken Layer Breeding Program.

Liao Meina M   Wu Jiaen J   Li Yafei Y   Lu Xiaoqing X   Tan Huizhen H   Chen Shanshan S   Huang Wenqing W   Lian Xinlei X   Sun Jian J   Liao Xiaoping X   Liu Yahong Y   Feng Saixiang S   Zhang Rongmin R  

Animals : an open access journal from MDPI 20221226 1


We determined the longitudinal persistence of ceftiofur-resistant <i>Escherichia coli</i> from a chicken breeding farm in China. A total of 150 samples were collected from 5 breeding periods in a flock of layer hens, and the prevalence of ceftiofur-resistant <i>E. coli</i> fluctuated across the 5 chicken breeding stages: eggs, 3.33%; growing period, 100%; early laying period, 36.7%; peak laying period, 66.7% and late laying period, 80%. The most prevalent ceftiofur resistance genes were <i>bla</  ...[more]

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