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Acinetobacter baumannii outbreak isolates characterized by three typing methods

G Aubert1, F Grimont, F Zéni

  • 1Service de Bacteriologie, CHRU Hôpital Bellevue, Saint-Etienne, France.

European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology
|December 1, 1995
PubMed
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Multiresistant Acinetobacter baumannii strains were tracked in a French intensive care unit using biotyping, antibiotyping, and ribotyping. These methods confirmed the transmission of specific epidemic strains between hospitals.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Epidemiology

Background:

  • Acinetobacter baumannii is a significant opportunistic pathogen, frequently causing hospital-acquired infections, particularly in intensive care units.
  • Multiresistant strains of Acinetobacter baumannii pose a substantial threat to patient health and complicate treatment strategies.

Purpose of the Study:

  • To investigate the transmission dynamics of multiresistant Acinetobacter baumannii strains within a French intensive care unit.
  • To evaluate the effectiveness of combined typing methods for epidemiological surveillance of Acinetobacter baumannii.

Main Methods:

  • Biotyping, antibiotyping, and ribotyping were employed to characterize Acinetobacter baumannii isolates.
  • Isolates were collected from patients during an outbreak, as well as from historical collections from different hospitals.

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Main Results:

  • The study successfully identified specific epidemic strains of Acinetobacter baumannii.
  • Biotyping, antibiotyping, and ribotyping demonstrated high concordance in identifying and correlating the epidemic strains.
  • Consistent antibiotic resistance patterns, biotypes, and ribotypes were observed among the outbreak strains.

Conclusions:

  • Combined microbiological typing methods are effective for tracing the transmission of multiresistant Acinetobacter baumannii.
  • Patient transfer between healthcare facilities can facilitate the spread of epidemic Acinetobacter baumannii strains.