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Serratia bacteremia.

E Bouza1, M García de la Torre, A Erice

  • 1Infectious Disease Unit (Microbiology Service), Centro Especial Ramón y Cajal, Madrid, Spain.

Diagnostic Microbiology and Infectious Disease
|August 1, 1987
PubMed
Summary
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Serratia bacteremia, often hospital-acquired, presents with fever and shock. High resistance to gentamicin and factors like critical illness predict poor outcomes, highlighting treatment challenges.

Area of Science:

  • Infectious Diseases
  • Clinical Microbiology
  • Epidemiology

Background:

  • Serratia bacteremia is a significant cause of bloodstream infections.
  • Understanding its epidemiology and clinical features is crucial for patient management.

Purpose of the Study:

  • To analyze the clinical characteristics, outcomes, and prognostic factors of Serratia bacteremia.
  • To assess antimicrobial resistance patterns of Serratia isolates.

Main Methods:

  • Retrospective analysis of 50 patients with Serratia bacteremia over a 6-year period.
  • Identification of the most frequent species (Serratia marcescens) and portals of entry.
  • Evaluation of clinical findings, including fever, shock, and disseminated intravascular coagulation.

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Main Results:

  • 92% of cases were nosocomially-acquired, with urinary and respiratory tracts as common entry points.
  • Fever was universal; shock occurred in 28%.
  • 62% of isolates showed gentamicin resistance, and overall mortality was 38%.

Conclusions:

  • Serratia bacteremia, particularly hospital-acquired, is associated with high mortality.
  • Factors like underlying disease severity, shock, polymicrobial bacteremia, respiratory infection, and inadequate treatment predict poor prognosis.
  • High rates of gentamicin resistance necessitate careful antibiotic selection.