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Related Experiment Videos

Surveillance for antimicrobial resistance in enterococci

S L Taylor1, S Pottumarthy, C G Wong

  • 1Auckland Hospital.

The New Zealand Medical Journal
|July 11, 1997
PubMed
Summary

Antimicrobial resistance patterns in Auckland reveal that vancomycin resistance is rare in clinical enterococcal isolates. High-level gentamicin and streptomycin resistance were observed in 15% and 12% of isolates, respectively.

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Area of Science:

  • Clinical microbiology
  • Infectious diseases
  • Antimicrobial resistance

Background:

  • Antimicrobial-resistant enterococci are significant nosocomial pathogens.
  • Periodic local resistance pattern surveys are recommended for hospitals.

Purpose of the Study:

  • To characterize antimicrobial resistance profiles of Enterococcus species in Auckland.
  • To establish a local susceptibility baseline for enterococcal isolates.

Main Methods:

  • Enterococcal isolates from four distinct patient groups were analyzed.
  • Testing included beta-lactamase production, susceptibility to amoxycillin, teicoplanin, vancomycin, and high-level gentamicin/streptomycin resistance.

Main Results:

  • Of 433 isolates, 74% were E. faecalis, 12% E. faecium. No beta-lactamase production was detected.

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  • All E. faecalis were amoxycillin-susceptible; two E. faecium and one other species showed resistance.
  • Teicoplanin susceptibility was universal. Vancomycin resistance was rare, primarily intermediate in E. gallinarum/casseliflavus. High-level gentamicin and streptomycin resistance occurred in 15% and 12% of isolates, respectively.

    • Conclusions:

    • Vancomycin resistance is uncommon and mainly associated with E. gallinarum/casseliflavus.
    • The study established local enterococcal susceptibility patterns.
    • This data facilitates comparison with other regions and monitors emerging resistance trends.