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Updated: May 17, 2026

Visualizing Non-lytic Exocytosis of Cryptococcus neoformans from Macrophages Using Digital Light Microscopy
Published on: October 21, 2014
Mechanisms of infection by the human fungal pathogen Cryptococcus neoformans
1Infection & Immunity, Clinical Sciences Division, St Georges' University of London, London SW17 0RE, UK.
Abstract:
Brain infection by the fungus Cryptococcus neoformans results in inflammation of the meninges and brain parenchyma, a condition known as meningoencephalitis. One million people are estimated to suffer cryptococcal meningitis globally and >60% of these cases die within 3 months of diagnosis. Humans are believed to contract infection by inhalation of spores or dried yeast cells, which subsequently colonize the lung tissue. In the lungs, cryptococci may be cleared by the lung phagocytes, stay latent, cause pulmonary infection and/or disseminate to other body parts, preferentially the brain, culminating in cryptococcal meningoencephalitis. In this review, we discuss the pathogenesis of C. neoformans from the environment to the brain, the current understanding of the mechanisms of cryptococcal transmission into the brain and cryptococcal meningitis. We also give an insight into future cryptococcosis research and the development of novel therapies.
Insights
Cryptococcus neoformans causes meningoencephalitis, a deadly brain infection. This review explores its pathogenesis, transmission to the brain, and potential new therapies for cryptococcosis.
Area of Science:
- Mycology
- Infectious Diseases
- Neuroscience
Background:
- Cryptococcus neoformans causes meningoencephalitis, leading to high mortality.
- Cryptococcal meningitis affects one million people globally, with over 60% mortality within 3 months.
- Infection is acquired via inhalation, with initial colonization in the lungs.
Purpose of the Study:
- To review the pathogenesis of C. neoformans from environmental exposure to brain dissemination.
- To elucidate current understanding of cryptococcal transmission mechanisms into the brain.
- To provide insights into future research and novel therapeutic strategies for cryptococcosis.
Main Methods:
- Literature review of existing research on Cryptococcus neoformans pathogenesis and transmission.
- Synthesis of current knowledge on the mechanisms of fungal entry into the central nervous system.
- Analysis of emerging therapeutic approaches for cryptococcal infections.
Main Results:
- C. neoformans infection initiates in the lungs, with potential for clearance, latency, or dissemination.
- The brain is a preferential site for cryptococcal dissemination, resulting in meningoencephalitis.
- Understanding transmission pathways is crucial for developing targeted interventions.
Conclusions:
- Meningoencephalitis caused by C. neoformans remains a significant global health challenge.
- Further research into fungal pathogenesis and host-pathogen interactions is essential.
- Development of novel therapies is critical to improve outcomes for cryptococcal meningitis patients.
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