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Pulmonary cryptococcosis.

Olivier Lortholary1, Hilario Nunez, Michel W Brauner

  • 1Service des Maladies Infectieuses et Tropicales, Hôpital Necker, Paris, France. olortho@pasteur.fr

Seminars in Respiratory and Critical Care Medicine
|August 10, 2005
PubMed
Summary

Pulmonary cryptococcosis, caused by Cryptococcus neoformans, often reactivates in immunocompromised individuals. Early diagnosis and antifungal treatment are crucial for both immunocompromised and some immunocompetent patients with this respiratory infection.

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Area of Science:

  • Mycology
  • Infectious Diseases
  • Pulmonology

Background:

  • Pulmonary cryptococcosis results from inhaling Cryptococcus neoformans, an encapsulated yeast.
  • Disease acquisition is typically early in life, with reactivation common in immunocompromised hosts, especially those with human immunodeficiency virus (HIV).
  • Clinical and radiological presentations are nonspecific and more severe in individuals with acquired immunodeficiency syndrome (AIDS).

Purpose of the Study:

  • To review the epidemiology, clinical manifestations, diagnosis, and management of pulmonary cryptococcosis.
  • To highlight the importance of considering this infection in both immunocompromised and immunocompetent individuals.
  • To emphasize the need for prompt diagnosis and appropriate antifungal therapy.

Main Methods:

Related Experiment Videos

  • Review of existing literature on pulmonary cryptococcosis.
  • Analysis of diagnostic approaches including bronchoalveolar lavage and histopathological/mycological examination.
  • Discussion of treatment strategies for various host immune statuses.

Main Results:

  • Pulmonary cryptococcosis can present nonspecifically and may manifest as fulminant disease even in immunocompetent hosts.
  • Respiratory tract colonization by C. neoformans is rare and typically occurs in immunocompetent individuals with pre-existing lung disease.
  • Diagnosis may involve bronchoalveolar lavage or analysis of pulmonary nodules, with a work-up for dissemination being essential.

Conclusions:

  • Pulmonary cryptococcosis requires prompt diagnosis and antifungal treatment in most immunocompetent hosts and always in immunocompromised patients.
  • Dissemination screening is critical in all cases of pulmonary cryptococcosis.
  • Understanding the varied presentations is key for effective management.