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Size Matters: Measurement of Capsule Diameter in Cryptococcus neoformans
Published on: February 27, 2018
A holistic review on Cryptococcus neoformans
Sudarshan Singh Rathore1, Jananishree Sathiyamoorthy2, Cheepurupalli Lalitha2
1Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA University, Tirumalaisamudram, Thanjavur, 613401, Tamilnadu, India; CSIR- Central Institute of Mining and Fuel Research, Dhanbad, Jharkhand, India.
Abstract:
Cryptococcus neoformans is an encapsulated fungal pathogen that causes infection in immunocompromised individuals such as HIV patients, organ transplant patients, hematological malignancies, diabetes patients, etc. The most common invasive fungal pathogens are Candida spp., Aspergillus spp., and Cryptococcus spp. Cryptococcal meningitis has become increasingly common in immunocompromised patients resulting in a death rate of up to 90%. In low-income and middle-income countries, C. neoformans is a neglected killer in most parts of the world. It has unique and complicated virulence factors that facilitate its intracellular survival and dissemination. The initial infection, latency, or dissemination of the pathogen is determined by its specific morphological features such as capsule size, melanin pigment, biofilm development, etc. In this review, we discussed the worldwide distribution, classification of Cryptococcus spp., and a major focus on the pathogen's strategies that allow it to survive, proliferate subsequently disseminate resulting in cellular damage and treatment.
Insights
Cryptococcus neoformans is a fungal pathogen causing life-threatening meningitis in immunocompromised individuals, particularly in low-income countries. This review details its virulence factors, survival strategies, and global impact.
Area of Science:
- Mycology
- Infectious Diseases
- Immunology
Background:
- Cryptococcus neoformans is a significant encapsulated fungal pathogen.
- It disproportionately affects immunocompromised individuals (e.g., HIV/AIDS, transplant recipients).
- Cryptococcal meningitis has a high mortality rate (up to 90%) and is a neglected global health issue.
Purpose of the Study:
- To review the global distribution and classification of Cryptococcus species.
- To elucidate the virulence factors and survival mechanisms of C. neoformans.
- To highlight the pathogen's strategies for proliferation, dissemination, and causing cellular damage.
Main Methods:
- Literature review of worldwide distribution and classification.
- Analysis of C. neoformans virulence factors (capsule, melanin, biofilm).
- Discussion of pathogen survival, proliferation, and dissemination mechanisms.
Main Results:
- Cryptococcus spp. are major invasive fungal pathogens.
- Morphological features like capsule size and melanin influence infection.
- Virulence factors enable intracellular survival, proliferation, and dissemination.
Conclusions:
- C. neoformans poses a severe threat, especially in low-resource settings.
- Understanding its virulence is crucial for developing effective treatments.
- Further research into its complex strategies is needed to combat cryptococcal disease.
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