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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
PubMed

Insights

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.

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