Distribution of ESBLs, AmpC β-lactamases and carbapenemases among Enterobacteriaceae isolates causing intra-abdominal and urinary tract infections in the Asia-Pacific region during 2008-14: Results from the Study for Monitoring Antimicrobial Resistance Trends (SMART)

  • SMART Asia-Pacific Group

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    88 Citations (Scopus)

    Abstract

    Objectives: To investigate the antimicrobial resistance and assess the molecular characteristics of β-lactamases (ESBLs, AmpC β-lactamases and carbapenemases) among Enterobacteriaceae isolates that caused intraabdominal infections (IAIs) in patients hospitalized in the Asia-Pacific region during 2008-14. Methods: Multiplex PCR was used to detect the specific types of β-lactamase in 2893 isolates with MICs of ertapenem.0.5 mg/L. In-hospital acquisition times for most isolates were also delineated. Results: Among 2728 (94.3%) isolates proven with β-lactamase production, the rates of non-susceptibility to imipenem were low (average=7.9%) among IAI Enterobacteriaceae isolates from all Asia-Pacific countries except Vietnam (17.7%) and the Philippines (10.2%). A stepwise and significant increase in annual rates of carbapenemase production among these isolates was noted. CTX-M-15 and CTX-M-14 were the dominant ESBL variants in most IAI Enterobacteriaceae species. The most abundant AmpC β-lactamase variants were blaCMY-2 among isolates of Escherichia coli and blaDHA-1 among isolates of Klebsiella pneumoniae. In addition, the IAI Enterobacteriaceae isolates harbouring a blaCMY-2 or blaDHA-1 allele were associated with high communityacquired rates (38.0% and 42.6%, respectively). AmpC ACT and MIR variants were mostly detected in Enterobacter species. The blaNDM-1,4,5,7-harbouring isolates of E. coli, K. pneumoniae and Enterobacter cloacae were most commonly identified among IAI isolates from Vietnam and the Philippines. Also of note, blaOXA-48- harbouring IAI Enterobacteriaceae isolates were detected exclusively in Vietnam. Conclusions: The high resistance burden in Vietnam and the Philippines warrants aggressive control policies to combat the worsening trend in antimicrobial resistance among Enterobacteriaceae species causing IAIs.

    Original languageEnglish
    Pages (from-to)166-171
    Number of pages6
    JournalJournal of Antimicrobial Chemotherapy
    Volume72
    Issue number1
    DOIs
    Publication statusPublished - 2017 Jan

    Bibliographical note

    Publisher Copyright:
    © The Author 2016.

    UN SDGs

    This output contributes to the following UN Sustainable Development Goals (SDGs)

    1. SDG 3 - Good Health and Well-being
      SDG 3 Good Health and Well-being

    ASJC Scopus subject areas

    • Microbiology (medical)
    • Pharmacology (medical)
    • Infectious Diseases
    • Pharmacology

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