New Insights Into Cryptococcus Spp. Biology and Cryptococcal Meningitis

Area of Science:

• Infectious Diseases
• Immunology
• Neurology

Background:

• Defective cell-mediated immunity significantly increases cryptococcosis risk.
• Cryptococcal meningitis (CM) arises from pulmonary Cryptococcus spread to the brain.
• Understanding yeast virulence factors is crucial for CM pathogenesis.

Purpose of the Study:

• To review recent advancements in the prevention of CM.
• To highlight new diagnostic strategies for CM.
• To discuss updated management protocols for CM.

Main Methods:

• Detection of Cryptococcal antigen (CrAg) using point-of-care lateral flow assays in blood and cerebrospinal fluid.
• Implementation of World Health Organization-recommended 7-day induction therapy with amphotericin B and flucytosine.
• Management of raised intracranial pressure through daily therapeutic lumbar punctures.

Main Results:

• Simplified diagnosis of CM is now possible.
• Recommended induction treatment involves 7-day amphotericin B plus flucytosine, followed by high-dose fluconazole.
• Delayed antiretroviral therapy initiation (4-6 weeks) is advised for HIV-associated CM to prevent immune reconstitution inflammatory syndrome.

Conclusions:

• CM remains a life-threatening condition requiring prompt diagnosis and treatment.
• Effective CM management necessitates antifungal combination therapy and intracranial pressure control.
• Mandatory screening for immune deficiency in all cryptococcosis patients is recommended.