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Related Concept Videos

Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
Pharmacokinetics: Drug–Food and Drug–Viral Interactions01:26

Pharmacokinetics: Drug–Food and Drug–Viral Interactions

A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of many...
Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin create...
Antifungal Agents01:15

Antifungal Agents

Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...

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Updated: Jun 14, 2026

Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans
11:07

Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans

Published on: December 19, 2014

Cryptococcal interactions with the host immune system.

Kerstin Voelz1, Robin C May

  • 1School of Biosciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.

Eukaryotic Cell
|April 13, 2010
PubMed
Summary
This summary is machine-generated.

Cryptococcus neoformans is a growing threat, causing cryptococcosis in both immunocompromised and healthy individuals. Understanding fungal evasion tactics and host immunity is key for developing new treatments.

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Last Updated: Jun 14, 2026

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11:07

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Published on: December 19, 2014

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Area of Science:

  • Medical Mycology
  • Immunology
  • Infectious Diseases

Background:

  • Opportunistic fungal pathogens like Cryptococcus neoformans are increasingly significant due to the AIDS pandemic.
  • Cryptococcosis is a major cause of mortality in sub-Saharan Africa and an emerging threat to immunocompetent populations.
  • Host immune responses critically influence cryptococcosis outcomes, with immune deficiencies leading to severe, often fatal, disseminated infections.

Purpose of the Study:

  • To review innate and adaptive immune responses to Cryptococcus.
  • To examine cryptococcal strategies for evading host defenses.
  • To discuss the role of these strategies in pathogenesis and explore immunotherapy potential for cryptococcosis.

Main Methods:

  • Literature review of immunological and pathogenic studies on Cryptococcus neoformans.
  • Analysis of host-pathogen interactions in both immunocompetent and immunocompromised individuals.
  • Synthesis of current knowledge on cryptococcal immune evasion mechanisms.

Main Results:

  • Cryptococcus neoformans frequently infects individuals in childhood, often remaining latent in immunocompetent hosts.
  • Immune deficiencies allow the fungus to disseminate, leading to uniformly fatal infections without prompt treatment.
  • Cryptococcus employs specific strategies to counteract host immune defenses, contributing to its pathogenesis.

Conclusions:

  • Understanding the interplay between Cryptococcus and the host immune system is crucial for managing cryptococcosis.
  • Cryptococcal immune evasion mechanisms are central to disease development.
  • Immunotherapy presents a promising avenue for future cryptococcosis treatment strategies.