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Journal of Clinical Microbiology, March 2007, p. 902-905, Vol. 45, No. 3
0095-1137/07/$08.00+0     doi:10.1128/JCM.01573-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Distinct Antimicrobial Resistance Patterns and Antimicrobial Resistance-Harboring Genes According to Genomic Species of Acinetobacter Isolates{triangledown}

Yu Mi Lim,1 Kyeong Seob Shin,2 and Jungmin Kim1*

Department of Microbiology, Kyungpook National University, School of Medicine, Daegu 700-422,1 Department of Laboratory Medicine, College of Medicine, Chungbuk National University, Cheongju 361-711, Republic of Korea2

Received 31 July 2006/ Returned for modification 28 September 2006/ Accepted 13 December 2006

Using 58 isolates of Acinetobacter species recovered from a university hospital between August 2004 and March 2005, we performed genomic identification by amplified rRNA gene restriction analysis (ARDRA) and investigated the existence of metallo-ß-lactamase (MBL) producers and extended-spectrum ß-lactamase (ESBL) producers. Genomic species identification of Acinetobacter strains using ARDRA showed that 40 strains were genomic species 2 (Acinetobacter baumannii), 9 were 13 sensu Tjernberg and Ursing (13TU), 5 were Acinetobacter phenon 6/ct 13TU, and 4 were Acinetobacter genospecies 3. Among 58 strains, 13 isolates were MBL producers carrying blaIMP-1 or blaVIM-2 and 13 isolates were ESBL producers carrying blaPER-1. Notably, the MBL producers were mostly 13TU, Acinetobacter phenon 6/ct 13TU, and Acinetobacter genospecies 3, which showed susceptibility to ciprofloxacin and ampicillin-sulbactam. However, 12 of 13 strains carrying blaPER-1 were A. baumannii, showing multidrug resistance. The data revealed that the antimicrobial resistance patterns and resistance-harboring genes of Acinetobacter species are remarkably distinct according to the genomic species of Acinetobacter isolates.

* Corresponding author. Mailing address: Department of Microbiology, Kyungpook National University, School of Medicine, 101, Dongin-2Ga, Junggu, Daegu 700-422, Republic of Korea. Phone: 82-53-420-4845. Fax: 82-53-427-5664. E-mail: minkim{at}knu.ac.kr.

{triangledown} Published ahead of print on 27 December 2006.

Journal of Clinical Microbiology, March 2007, p. 902-905, Vol. 45, No. 3
0095-1137/07/$08.00+0     doi:10.1128/JCM.01573-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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