Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 57, Issue 11, Pages 5239-5246Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.00633-13
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Science, ICT and Future Planning [NRF-2013R1A2A2A0101413]
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In this surveillance study, we identified the genotypes, carbapenem resistance determinants, and structural variations of AbaRtype resistance islands among carbapenem-resistant Acinetobacter baumannii (CRAB) isolates from nine Asian locales. Clonal complex 92 (CC92), corresponding to global clone 2 (GC2), was the most prevalent in most Asian locales (83/108 isolates; 76.9%). CC108, or GC1, was a predominant clone in India. OXA-23 oxacillinase was detected in CRAB isolates from most Asian locales except Taiwan. bla(OXA-24) was found in CRAB isolates from Taiwan. AbaR4-type resistance islands, which were divided into six subtypes, were identified in most CRAB isolates investigated. Five isolates from India, Malaysia, Singapore, and Hong Kong contained AbaR3-type resistance islands. Of these, three isolates harbored both AbaR3-and AbaR4-type resistance islands simultaneously. In this study, GC2 was revealed as a prevalent clone in most Asian locales, with the AbaR4-type resistance island predominant, with diverse variants. The significance of this study lies in identifying the spread of global clones of carbapenem-resistant A. baumannii in Asia.
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