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. 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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