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Ralstonia pickettii traced in blood culture bottles

Névine Boutros1, Nevriye Gonullu, Anne Casetta

  • 1Department of Microbiology, Antoine Béclère Hospital, Clamart, France. nevine.boutros@abc.ap-hop-paris.fr

Journal of Clinical Microbiology
|June 29, 2002
PubMed

Insights

Contaminated blood culture bottle caps led to 14 Ralstonia pickettii infections over nine months. Molecular analysis confirmed the strains were related, pinpointing the caps as the contamination source.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Epidemiology

Background:

  • Ralstonia pickettii is an opportunistic pathogen.
  • Blood culture contamination can lead to misdiagnosis and inappropriate treatment.
  • Identifying sources of contamination is crucial for patient safety.

Purpose of the Study:

  • To investigate the source of Ralstonia pickettii contamination in biological samples.
  • To determine the relatedness of isolated Ralstonia pickettii strains.
  • To implement measures to prevent future contamination events.

Main Methods:

  • Isolation of bacterial strains from biological samples using blood culture medium.
  • Molecular epidemiological investigation (e.g., DNA sequencing or typing) to assess strain relatedness.
  • Root cause analysis to identify the source of contamination.

Main Results:

  • Fourteen strains of Ralstonia pickettii were isolated over a 9-month period.
  • Molecular analysis confirmed that all isolated strains were related.
  • The contamination was traced back to the blood culture bottle caps.

Conclusions:

  • Blood culture bottle caps were identified as the source of Ralstonia pickettii contamination.
  • This contamination posed a risk of false-positive results and potential patient harm.
  • Strict quality control of blood culture supplies is essential to prevent similar outbreaks.

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