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Thoracic infection caused by Streptococcus milleri

G Porta1, M Rodríguez-Carballeira, L Gómez

  • 1Internal Medicine Service, Hospital Mútua de Terrassa, University of Barcelona, Spain.

The European Respiratory Journal
|September 4, 1998
PubMed
Summary
This summary is machine-generated.

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Thoracic infections caused by Streptococcus milleri (SM) are often pleural and polymicrobial, frequently linked to hospital stays and digestive or respiratory tract procedures. Treatment combining antibiotics and surgery is effective, with SM strains susceptible to penicillin.

Area of Science:

  • Infectious Diseases
  • Pulmonology
  • Microbiology

Background:

  • The Streptococcus milleri (SM) group's role as respiratory pathogens requires further elucidation.
  • Thoracic infections encompass a range of conditions including empyema, pneumonia, and mediastinitis.

Purpose of the Study:

  • To understand the significance of Streptococcus milleri (SM) group in respiratory infections.
  • To analyze epidemiological and clinical characteristics of SM-caused thoracic infections.
  • To compare SM-related empyema with pneumococcal empyema regarding epidemiology and prognosis.

Main Methods:

  • Retrospective review of 27 cases of thoracic infection caused by SM over 8 years.
  • Analysis of clinical histories and microbiology reports.
  • Comparison with concurrently occurring pneumococcal empyema cases.

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Main Results:

  • SM infections led to empyema (12), pneumonia (3), and mediastinitis (2).
  • SM was the sole pathogen in 17 cases; 59% had prior digestive/respiratory tract procedures.
  • Treatment success rate was 81% (22/27); all SM strains were penicillin-susceptible.
  • SM empyema differed from pneumococcal empyema in age, infection origin, and surgical necessity.

Conclusions:

  • Thoracic infections caused by SM are predominantly pleural, often polymicrobial, and hospital-acquired.
  • These infections are frequently associated with major surgery or procedures on the respiratory/digestive tracts.
  • SM-related empyema often necessitates thoracotomy for complete resolution.