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 language | English |
|---|---|
| Pages (from-to) | 166-171 |
| Number of pages | 6 |
| Journal | Journal of Antimicrobial Chemotherapy |
| Volume | 72 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2017 Jan |
Bibliographical note
Publisher Copyright:© The Author 2016.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
ASJC Scopus subject areas
- Microbiology (medical)
- Pharmacology (medical)
- Infectious Diseases
- Pharmacology
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