| Title |
Detection of Pseudomonas aeruginosa Carried a New Array of Gene Cassettes within Class 1 Integron Isolated from a Teaching Hospital in Nanjing, China |
| Author |
Yuan Wu†, Hui Li†, Jun Li, and Zu Hu Huang* |
| Address |
The Department of Infectious Diseases, the First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu Province 210029, P. R. China |
| Bibliography |
Journal of Microbiology, 46(6),687-691, 2008,
|
| DOI |
|
| Key Words |
Pseudomonas aeruginosa, gene cassette, class 1 integron |
| 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. |
