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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

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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:

Related Experiment Videos

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.