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Lung function changes following Legionnaires' disease.

J Gea1, R Rodriguez-Roisin, A Torres

  • 1Servei de Pneumologia, Hospital Clinic, Facultat de Medicina, Universitat de Barcelona, Spain.

The European Respiratory Journal
|February 1, 1988
PubMed
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Legionnaires' disease can cause severe pneumonia and hypoxemia. While lung function improves, some patients experience lasting respiratory issues like restrictive defects and reduced gas exchange.

Area of Science:

  • Pulmonology
  • Infectious Diseases
  • Critical Care Medicine

Background:

  • Legionnaires' disease, caused by Legionella Pneumophila, is a severe form of pneumonia.
  • Hospitalized patients often experience acute respiratory distress, including hypoxemia requiring ventilatory support.

Purpose of the Study:

  • To evaluate the long-term pulmonary functional sequelae in patients recovering from severe Legionnaires' disease pneumonia.
  • To identify persistent respiratory abnormalities and assess the overall recovery trajectory.

Main Methods:

  • Prospective evaluation of 11 hospitalized patients with severe Legionella Pneumophila pneumonia over 53 months.
  • Pulmonary function tests were conducted during the acute phase, early recovery (less than 6 months post-discharge), and long-term (6-33 months post-discharge).

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Main Results:

  • Severe hypoxemia was present in most patients during the acute phase, with one fatality.
  • Subclinical ventilatory and gas exchange abnormalities were common a few months after discharge.
  • Some functional deficits persisted long-term, but overall lung function showed significant improvement.

Conclusions:

  • Legionnaires' disease can lead to significant, though often improving, pulmonary functional sequelae.
  • Potential long-term effects include restrictive ventilatory defects, reduced gas transfer (low transfer factor), and persistent hypoxemia.
  • While recovery occurs, careful monitoring for residual respiratory impairment is warranted.