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Bacteraemic Haemophilus influenzae pneumonia.

M B Allen1, K Prowse

  • 1Dept. of Respiratory Physiology, City General Hospital, Stoke on Trent, Staffs, UK.

The European Respiratory Journal
|December 1, 1988
PubMed
Summary

Haemophilus influenzae pneumonia bacteraemia is rare but serious, particularly in the elderly. Early diagnosis and treatment are crucial, as some strains produce beta-lactamase, complicating management and potentially leading to empyema.

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Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Pulmonary Medicine

Background:

  • Bacteraemia caused by Haemophilus species, particularly Haemophilus influenzae, is infrequently documented.
  • Pneumonia is a common manifestation of respiratory infections, but bacteraemia complicates its presentation.

Purpose of the Study:

  • To determine the incidence and clinical features of Haemophilus species bacteraemia, specifically in patients with pneumonia.
  • To identify risk factors and outcomes associated with Haemophilus influenzae bacteraemia.

Main Methods:

  • A retrospective review of case notes was conducted over a five-year period.
  • Patients with Haemophilus spp. isolated from blood and pleural fluid were identified and analyzed.

Main Results:

  • Eight adult patients with Haemophilus influenzae bacteraemia were identified; five had concurrent pneumonia.
  • One patient had chronic obstructive lung disease as a predisposing factor.
  • Two isolates were beta-lactamase producing, with one case progressing to empyema requiring surgical drainage.
  • Four elderly patients (69-80 years) presented in shock.
  • Seven out of eight patients survived.

Conclusions:

  • Haemophilus influenzae bacteraemia, though uncommon, can present as severe pneumonia, especially in the elderly.
  • The emergence of beta-lactamase producing strains necessitates careful antibiotic selection to prevent complications like empyema.
  • Prompt diagnosis and management are vital for favorable outcomes in these patients.

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