KMID : 0829320080110020098
|
|
Korean Journal of Clinical Microbiology 2008 Volume.11 No. 2 p.98 ~ p.106
|
|
Characteristics of Acquired ¥â-lacamase Gene in Clinical Isolates of Multidrug-resistant Pseudomonas aeruginosa
|
|
Chung Sun-Yang
Sung Ji-Youn Koo Sun-Hoe Ko Chi-Seon Park Jong-Woo Shin So-Youn Song Jung-Hoon Kwon Kye-Chul
|
|
Abstract
|
|
|
Background: Recently, there have been reports of infections with multidrug-resistant Pseudomonas aeruginosa. To determine the mechanism of the resistance, we investigated the prevalence of Ambler class A and D ¥â-lactamases, their extended-spectrum derivatives, and class B and D carbapenemase in multidrug-resistant P. aeruginosa isolates.
Methods: During the period of March 2006 to May 2007, clinical isolates of multidrug-resistant P. aeruginosa were collected from patients in Chungnam National University Hospital, Daejeon, Korea. Inhibitor-potentiated disk diffusion tests were used for the screening of metallo-¥â-lactamase (MBL) production. PCR and DNA sequencing were conducted for the detection of ¥â-lactamase genes. We also employed the enterobacterial repetitive intergenic consensus (ERIC)-PCR method for an epidemiologic study.
Results: A total of 37 consecutive, non-duplicate, multidrug-resistant P. aeruginosa were isolated. Twentynine of 37 isolates harbored blaOXA-10 (56.8%), blaOXA-2 (18.9%), and blaOXA-1 (5.4%). Only one isolate produced IMP-1, and it also harbored blaOXA-1. None harbored Ambler class A ¥â-lactamase or class D carbapenemase. The strains producing OXA type ¥â-lactamases showed a significantly higher resistance to aminoglycoside compared to non-producers. The ERIC-PCR pattern of the 19 OXA-10 producing strains indicated that the isolates were closely related in terms of clonality.
Conclusion: OXA type ¥â-lactamases are the most prevalent among the acquired ¥â-lactamases produced by multidrug-resistant P. aeruginosa isolated at a university hospital in Chungcheong Province. Besides ¥â-lactam antibiotics, the strains harboring OXA type ¥â-lactamase showed a significantly higher resistance to aminoglycoside and qunolone. (Korean J Clin Microbiol 2008;11:98-106)
|
|
KEYWORD
|
|
Multidrug resistance, Pseudomonas aerugi-nosa, OXA type ¥â-ractamase, Metallo- ¥â-lactamase (MBL)
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|
|