Characterisation of two new gene cassettes, aadA5 and dfrA17

被引：89

作者：

White, PA ^{[1
]}

McIver, CJ ^{[1
]}

Deng, YM ^{[1
]}

Rawlinson, WD ^{[1
]}

机构：

[1] Prince Wales Hosp, SEALS, Dept Microbiol, Div Virol, Randwick, NSW 2031, Australia

来源：

FEMS MICROBIOLOGY LETTERS | 2000年 / 182卷 / 02期

关键词：

gene cassette; integron; trimethoprim resistance; aadA5; dfrA17;

D O I：

10.1016/S0378-1097(99)00600-X

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Escherichia coli INS33 was isolated from the urinary tract of an infected patient. It was resistant to ampicillin, chloramphenicol, spectinomycin, streptomycin, sulfafurazole, tetracycline and trimethoprim. PCR screening revealed the presence of a class I integron that harboured two new gene cassettes, designated dfrA17 and aadA5. The new dfrA17 cassette was 91% identical to the known dfrA7 cassette. The aadA5 cassette was 95% identical over the first 830 bp to aadA4, but lacked the IS26 element found at the 3' end of this truncated cassette. Cloning and expression of the cassette region demonstrated that drA17 conferred high level resistance to trimethoprim but aadA5 conferred resistance to spectinomycin but not to streptomycin. (C) 2000 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

引用

页码：265 / 269

页数：5

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