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    The aim of this study was to investigate the presence and genetic environment of the multiresistance gene cfr gene in Pasteurella multocida of avian origin from China. A total of 113 P. multocida isolates were collected from sick poultries (ducks, chickens and geese) from 2003 to 2016 in Southern China and were screened for the presence of the cfr gene by PCR. The cfr-carrying P. multocida strains were subjected to antimicrobial susceptibility testing, S1 nuclease PFGE and Southern blot hybridisation, conjugative transfer and analysis of genetic environment of the cfr gene. Among 113 P. multocida isolates, strains FJ6671 and FJ6683 from Muscovy duck harboured the cfr gene and presented a multiresistant phenotype. The cfr gene in the two strains was located on an ∼40-kb conjugative plasmid in different genetic environments, including ISApl12-cfr-IS26 and IS26-cfr-IS256. These results demonstrate plasmid-carried cfr in P. multocida and suggest that transposition and homologous recombination mediated by IS26, ISApl1 and IS256 might have played an important role in transfer of the cfr gene in P. multocida. To the best of our knowledge, this is the first report of the cfr gene in P. multocida. Active and ongoing surveillance of cfr in P. multocida is urgently warranted. Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.


    Hongmei Chen, Hui Deng, Longfei Cheng, Rongchang Liu, Guanghua Fu, Shaohua Shi, Chunhe Wan, Qiuling Fu, Yu Huang, Xiaohong Huang. First report of the multiresistance gene cfr in Pasteurella multocida strains of avian origin from China. Journal of global antimicrobial resistance. 2020 Dec;23:251-255

    PMID: 33045440

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