Detection of plasmid-mediated tigecycline-resistant gene tet (X4) in Escherichia coli from pork, Sichuan and Shandong Provinces, China, February 2019

Li Bai, Pengcheng Du, Yinju Du, Honghu Sun, Pei Zhang, Yuping Wan, Qi Lin, Séamus Fanning, Shenghui Cui, Yongning Wu
Euro Surveillance 2019, 24 (25)
The plasmid-mediated high-level tigecycline resistance gene, tet (X4), was detected in seven Escherichia coli isolates from pork in two Chinese provinces. Two isolates belonged to the epidemic spreading sequence type ST101. Tet (X4) was adjacent to IS Vsa3 and concurrent with floR in all seven isolates. In addition to IncFIB, the replicon IncFII was found to be linked to tet (X4). This report follows a recent detection of tet (X3)/(X4) in E. coli from animals and humans in China.

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