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Stenotrophomonas maltophilia Pseudo-outbreak at a University Hospital Bronchoscopy Unit in Turkey

G Ece1, B Erac2, M H Limoncu2

  • 1Department of Medical Microbiology, Izmir University School of Medicine,Yeni Girne Boulevard, 1825th Street, 12 Karsiyaka, Izmir, Turkey. gulfem.ece@gmail.com.

The West Indian Medical Journal
|October 11, 2014
PubMed
Abstract

Insights

This study found identical Stenotrophomonas maltophilia strains during bronchoscopy, suggesting potential equipment contamination. Implementing strict cleaning protocols halted further S. maltophilia isolation, highlighting the importance of disinfection in preventing pathogen spread.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Clinical Diagnostics

Background:

  • Stenotrophomonas maltophilia is an opportunistic pathogen frequently found in healthcare settings.
  • Its spread is often linked to invasive procedures, diagnostic tools, and antibiotic misuse.
  • Bronchoscopy is a common procedure where pathogen transmission can occur.

Purpose of the Study:

  • To investigate consecutive isolations of S. maltophilia from bronchoalveolar lavage samples during bronchoscopy.
  • To determine the clonal relationship between S. maltophilia isolates obtained within a short timeframe.

Main Methods:

  • Collected bronchoalveolar lavage samples from four patients with S. maltophilia during bronchoscopy.
  • Identified isolates and assessed antibiotic susceptibility using the Vitek 2.0 system.
  • Analyzed clonal relatedness via enterobacterial repetitive intergenic consensus (ERIC) PCR.

Main Results:

  • Four consecutive S. maltophilia isolates exhibited identical band patterns on ERIC PCR, indicating clonal relatedness.
  • The findings suggest a potential common source of infection, possibly related to the bronchoscopy procedure.

Conclusions:

  • Consecutive S. maltophilia strains with identical genetic profiles were identified within a week during bronchoscopy.
  • Adherence to appropriate disinfection and cleaning protocols effectively prevented further isolation of the pathogen.
  • This highlights the critical role of instrument decontamination in preventing healthcare-associated infections.

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