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Streptococcus pneumoniae bacteraemia in children

C Myers1, Alain Gervaix

  • 1Department of Pediatrics, University Hospitals of Geneva, Switzerland.

International Journal of Antimicrobial Agents
|August 21, 2007
PubMed

Insights

Occult bacteremia from Streptococcus pneumoniae is common in young children, presenting diagnostic challenges due to fever as the sole symptom. Early diagnosis and appropriate antibiotic use are crucial for reducing severe outcomes and mortality.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Microbiology

Background:

  • Occult bacteremia caused by Streptococcus pneumoniae is the most common invasive bacterial infection in children under three years old.
  • Distinguishing occult bacteremia from viral illnesses is challenging for pediatricians due to overlapping symptoms, primarily fever.
  • Despite advanced medical care, the case fatality rate for bacteremia in infants under one year remains significant.

Purpose of the Study:

  • To review the challenges in diagnosing and managing occult bacteremia in young children.
  • To highlight the importance of laboratory markers in guiding antibiotic treatment decisions.
  • To discuss the impact of Streptococcus pneumoniae conjugate vaccines on invasive disease and the emergence of non-vaccine serotypes.

Main Methods:

  • Review of clinical presentation and diagnostic criteria for occult bacteremia.
  • Analysis of laboratory markers including white blood cell count, C-reactive protein, and procalcitonin levels.
  • Evaluation of management protocols and the role of antibiotic therapy.
  • Assessment of the epidemiological impact of Streptococcus pneumoniae vaccination.

Main Results:

  • Fever is often the only presenting symptom, complicating differential diagnosis with viral infections.
  • Laboratory tests are essential for accurate diagnosis and determining the need for antibiotic treatment.
  • The 7-valent conjugate vaccine has reduced invasive pneumococcal disease, but serotype replacement is a concern.
  • Case fatality rates for bacteremia in infants under one year are approximately 9% even in developed countries.

Conclusions:

  • Accurate diagnosis and timely antibiotic intervention are critical for managing occult pneumococcal bacteremia in children.
  • Vaccination strategies are effective in reducing disease burden but require ongoing surveillance for serotype shifts.
  • Continued monitoring of vaccine effectiveness and emerging serotypes is necessary to combat invasive pneumococcal disease.

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