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Pulmonary cryptococcosis

Joseph N Jarvis1, Thomas S Harrison

  • 1Centre for Infection, Department of Cellular and Molecular Medicine, St. George's University of London, London, United Kingdom.

Seminars in Respiratory and Critical Care Medicine
|March 28, 2008
PubMed

Insights

Cryptococcosis, a fungal infection, commonly affects AIDS patients but can occur in others. Early diagnosis and appropriate antifungal treatment are crucial for managing pulmonary cryptococcosis and preventing disseminated disease.

Area of Science:

  • Infectious Diseases
  • Mycology
  • Pulmonology

Background:

  • Cryptococcosis is an opportunistic infection, primarily affecting individuals with acquired immunodeficiency syndrome (AIDS).
  • Caused mainly by *Cryptococcus neoformans*, it can also be caused by *Cryptococcus gattii*, particularly in immunocompetent individuals.
  • Pulmonary cryptococcosis in human immunodeficiency virus (HIV)-seropositive individuals is often underdiagnosed and can lead to severe disseminated disease if untreated.

Purpose of the Study:

  • To review the epidemiology, clinical presentation, diagnosis, and management of pulmonary cryptococcosis.
  • To highlight the underdiagnosis of pulmonary cryptococcosis in HIV-seropositive individuals.
  • To discuss the varied presentations and diagnostic challenges influenced by immune status.

Main Methods:

  • Literature review of cryptococcosis, focusing on pulmonary manifestations.
  • Analysis of clinical and radiological presentations in immunocompromised and immunocompetent patients.
  • Summary of diagnostic methods including fungal isolation and antigen detection.

Main Results:

  • Pulmonary cryptococcosis presents with nonspecific respiratory symptoms and varied radiological findings.
  • Disease progression and dissemination are common in immunosuppressed patients.
  • Localized, self-limiting disease may occur in immunocompetent individuals.

Conclusions:

  • Prompt diagnosis and treatment of pulmonary cryptococcosis are essential, especially in HIV-positive patients.
  • Treatment strategies vary based on disease severity, with amphotericin B +/- flucytosine for severe cases and fluconazole for mild infections.
  • Understanding the influence of immune status on presentation and natural history is key for effective management.

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