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Characterization of Chromosome-Mediated BlaOXA-894 in Shewanella xiamenensis Isolated from Pig Wastewater

Department of environment and health, School of Public Health, Shandong University, Jinan 250012, China
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Int. J. Environ. Res. Public Health 2019, 16(19), 3768; https://doi.org/10.3390/ijerph16193768
Received: 28 August 2019 / Revised: 1 October 2019 / Accepted: 3 October 2019 / Published: 8 October 2019
(This article belongs to the Special Issue Water and Health)
A new variant of the blaOXA-546 gene, namely blaOXA-894, was identified on the chromosome of Shewanella xiamenensis isolated from pig wastewater in rural China. OXA-894 differs from OXA-546 (A46V, I219del) and OXA-48 (T167I, I219del) with two amino acid substitutions, respectively. The isolate was resistant to ampicillin, aztreonam, imipenem, meropenem and fosfomycin. Carba NP test confirmed S. xiamenensis strain sx20 as a carbapenemase-producer. The blaOXA-894 gene was located between the gene encoding a LysR family transcriptional regulator and the C15 gene. Its gene environment was similar to other S. xiamenensis with chromosome-located blaOXA-48-like genes. The T24H and T94V amino acid substitutions of LuxS protein were predicted to be deleterious, which may affect the virulence phenotype. The occurrence and potential health risk of carbapenem-resistant S. xiamenensis in a water environment is of concern. View Full-Text
Keywords: blaOXA-894; Shewanella xiamenensis; genetic environment; pig wastewater blaOXA-894; Shewanella xiamenensis; genetic environment; pig wastewater
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Zou, H.; Zhou, Z.; Xia, H.; Zhao, Q.; Li, X. Characterization of Chromosome-Mediated BlaOXA-894 in Shewanella xiamenensis Isolated from Pig Wastewater. Int. J. Environ. Res. Public Health 2019, 16, 3768.

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