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Cryptococcosis in the immunocompromised host with special reference to AIDS
N Khanna1, A Chandramuki, A Desai
1Department of Neuromicrobiology, National Institute of Mental Health and Neurosciences, Bangalore. nkhanna@nimhans.kar.nic.in
The Indian Journal of Chest Diseases & Allied Sciences
|December 16, 2004
Summary
Cryptococcosis, a fungal infection, is rising in immunocompromised individuals, particularly those with acquired immune deficiency syndrome (AIDS). This study highlights increased risks and poorer outcomes in HIV-positive patients with cryptococcal central nervous system (CNS) infections.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Neurology
Background:
- Cryptococcosis incidence is rising globally.
- Immunocompromised individuals, especially those with acquired immune deficiency syndrome (AIDS), are at higher risk.
- Central nervous system (CNS) cryptococcosis poses significant diagnostic and therapeutic challenges.
Purpose of the Study:
- To analyze the clinical and laboratory features of cryptococcal CNS infections.
- To compare outcomes in patients with and without HIV infection.
- To identify factors associated with increased mortality in cryptococcosis.
Main Methods:
- Retrospective analysis of 149 cases of CNS cryptococcosis diagnosed between January 1978 and June 1998.
- Cerebrospinal fluid (CSF) analysis including India ink mounts and cryptococcal antigen testing.
- Comparison of clinical and laboratory parameters between HIV-positive and HIV-negative patients.
Main Results:
- Culture confirmed cryptococcosis in most cases, with India ink and antigen tests showing high sensitivity.
- HIV-positive patients exhibited a poorer CSF cell response and higher rates of extra-neural cryptococcal isolates.
- Concomitant infections, particularly tuberculosis, and mortality were significantly higher in the HIV-positive group.
Conclusions:
- CNS cryptococcosis requires prompt diagnosis and management, especially in HIV-infected populations.
- HIV co-infection is associated with specific clinical and laboratory findings and increased mortality.
- Early identification of risk factors and co-infections is crucial for improving outcomes in cryptococcosis.