[Comparison between CSF samples from AIDS and non AIDS patients with neurocryptococcosis]

Area of Science:

• Neurology
• Infectious Diseases
• Immunology

Background:

• Neurocryptococcosis is a rare nervous system infection that has become more frequent with the rise of acquired immunodeficiency syndrome (AIDS).
• This fungal infection primarily affects individuals with compromised immune systems.
• Cerebrospinal fluid (CSF) alterations in neurocryptococcosis can mimic those of tuberculous meningitis.

Purpose of the Study:

• To compare cerebrospinal fluid (CSF) changes in patients with acquired immunodeficiency syndrome (AIDS) and non-AIDS patients diagnosed with meningoencephalitis caused by Cryptococcus neoformans.
• To identify distinct CSF profiles associated with neurocryptococcosis in immunocompromised versus immunocompetent individuals.

Main Methods:

• Analysis of 41 CSF samples from non-AIDS patients with neurocryptococcosis.
• Analysis of 23 CSF samples from AIDS patients with neurocryptococcosis.
• Comparative assessment of inflammatory markers, yeast cell counts, and other cellular/biochemical changes in CSF.

Main Results:

• CSF samples from AIDS patients exhibited lower inflammatory intensity compared to non-AIDS patients.
• Non-AIDS patients consistently showed additional CSF alterations alongside yeast cells.
• In some AIDS patients, the sole CSF abnormality was the presence of yeast cells.
• Higher yeast cell counts were observed in CSF samples from AIDS patients.
• CSF alterations mimicking tuberculous meningitis were common in non-AIDS patients but rare in AIDS patients.

Conclusions:

• The presence of Cryptococcus neoformans in CSF without other accompanying changes may indicate an AIDS diagnosis.
• Distinct CSF profiles can help differentiate neurocryptococcosis in AIDS versus non-AIDS patients.
• Understanding these differences is crucial for accurate diagnosis and management of neurocryptococcosis in diverse patient populations.