1. Molecular characterizations of chloramphenicol- and oxytetracycline-resistant bacteria and resistance genes in mariculture waters of China.
- Author
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Dang, Hongyue, Zhao, Jingyi, Song, Linsheng, Chen, Mingna, and Chang, Yaqing
- Subjects
MULTIDRUG resistance ,BACTERIAL diversity ,CHLORAMPHENICOL ,OXYTETRACYCLINE ,DRUG resistance in microorganisms ,BACTERIAL genetics ,VIBRIO ,MARICULTURE ,COMPARATIVE studies ,MICROBIAL genetics - Abstract
Abstract: In order to gain an understanding of the diversity and distribution of antimicrobial-resistant bacteria and their resistance genes in maricultural environments, multidrug-resistant bacteria were screened for the rearing waters from a mariculture farm of China. Both abalone Haliotis discus hannai and turbot Scophthalmus maximus rearing waters were populated with abundant chloramphenicol-resistant bacteria. These bacteria were also multidrug resistant, with Vibrio splendidus and Vibrio tasmaniensis being the most predominant species. The chloramphenicol-resistance gene cat II, cat IV or floR could be detected in most of the multidrug-resistant isolates, and the oxytetracycline-resistance gene tet(B), tet(D), tet(E) or tet(M) could also be detected for most of the isolates. Coexistence of chloramphenicol- and oxytetracycline-resistance genes partially explains the molecular mechanism of multidrug resistance in the studied maricultural environments. Comparative studies with different antimicrobial agents as the starting isolation reagents may help detect a wider diversity of the antimicrobial-resistant bacteria and their resistance genes. [Copyright &y& Elsevier]
- Published
- 2009
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