Detection of Pseudomonas aeruginosa Carried a New Array of Gene Cassettes within Class 1 Integron Isolated from a Teaching Hospital in Nanjing, China

Yuan Wu†; Hui Li†; Jun Li; Zu Hu Huang

doi:10.1007/s12275-008-0021-6

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Detection of Pseudomonas aeruginosa Carried a New Array of Gene Cassettes within Class 1 Integron Isolated from a Teaching Hospital in Nanjing, China: Yuan Wu† , Hui Li† , Jun Li , Zu Hu Huang; Journal of Microbiology 2008;46(6):687-691.
DOI: https://doi.org/10.1007/s12275-008-0021-6
Published online: December 24, 2008

The Department of Infectious Diseases, the First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu Province 210029, P. R. ChinaThe Department of Infectious Diseases, the First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu Province 210029, P. R. China

Corresponding author: Zu Hu Huang , Tel: 25-8362-0588,

Received: 21 January 2008 • Accepted: 3 September 2008

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Abstract

We report here novel array of gene cassettes found in single variable region of class 1 integron disseminated in Pseudomonas aeruginosa isolated from a teaching hospital in Nanjing, Jiangsu Province, China. 29 of 47 (61%) P. aeruginosa strains were confirmed haboured class 1 integron, and all the positive strains have the same variable region confirmed by PCR and RFLP methods. The variable region contained an unreported order of four gene cassettes aac(6’)-II-aadA13-cmlA8-oxa 10. Of those, cmlA8 gene was a variant of cmlA5 encoding non-enzymatic protein which putatively confer resistance to chloramphenicol. Susceptibility testing revealed multidrug-resistant mechanisms were involved in the class 1 integron positive clinical isolates. And the class 1 integron located on an about 15 kb transferable plasmid was certified by conjugation experiment and plasmid DNA analysis. The macro restriction profile indicated those clinical strains were clonally related.

Keywords: Pseudomonas aeruginosa;gene cassette;class 1 integron

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Detection of Pseudomonas aeruginosa Carried a New Array of Gene Cassettes within Class 1 Integron Isolated from a Teaching Hospital in Nanjing, China

J. Microbiol. 2008;46(6):687-691. Published online December 24, 2008

DOI: https://doi.org/10.1007/s12275-008-0021-6

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