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Legionnaires' disease.

J T Fairbank1, M M Patel, P A Dietrich

  • 1Department of Radiology, Medical Center Hospital of Vermont, Burlington 05401.

Journal of Thoracic Imaging
|July 1, 1991
PubMed
Summary
This summary is machine-generated.

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Legionella bacteria cause respiratory illness and were identified in 1976. Legionnaires' disease presents as pneumonia with delayed radiographic resolution, especially in organ transplant recipients.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Pulmonary Medicine

Background:

  • Legionella bacillus is a common cause of respiratory illness outbreaks.
  • The organism was isolated and identified in 1976 after extensive investigation.
  • Legionnaires' disease is a significant public health concern.

Purpose of the Study:

  • To describe the clinical and radiographic features of Legionnaires' disease.
  • To highlight diagnostic challenges and progression patterns.
  • To inform clinicians about atypical presentations in immunocompromised patients.

Main Methods:

  • Review of epidemiologic and microbiologic data.
  • Analysis of clinical case presentations.
  • Radiographic assessment of pulmonary findings.

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Main Results:

  • Legionnaires' disease often progresses rapidly to lobar pneumonia.
  • Radiographic findings lag behind clinical improvement and show prolonged resolution.
  • Organ transplant patients may exhibit rounded, pleura-based opacities mimicking pulmonary infarction, with potential cavitation.

Conclusions:

  • Legionnaires' disease diagnosis requires awareness of its varied presentation.
  • Radiographic findings are not pathognomonic and resolution is delayed.
  • Immunocompromised individuals, particularly organ transplant recipients, may present with atypical radiographic findings.