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Infecting Mice with Malassezia spp. to Study the Fungus-Host Interaction
Published on: November 6, 2019
Pathogenesis of dermatophytoses
1Department of Dermatology, Dr. D. Y. Patil Medical College, Pimpri, Pune, India.
Abstract:
Dermatophytes can survive solely on outer cornified layers of the skin. The ability of certain fungi to adhere to particular host arises from numerous mechanisms and host factors, including the ability to adapt to the human body. Natural infection is acquired by the deposition of viable arthrospores or hyphae on the surface of the susceptible individual. After the inoculation in the host skin, suitable conditions favor the infection to progress through the stages of adherence and penetration. Development of host response is mostly by a T-cell mediated response of delayed-type hypersensitivity. Antibody formation does not seem to be protective. Natural defenses against dermatophytes depend on both immunological and nonimmunological mechanisms.
Insights
Dermatophytes, fungi causing skin infections, adhere to and penetrate the skin. Host defenses involve T-cells, but antibodies are not protective against these fungal infections.
Area of Science:
- Medical Mycology
- Immunology
Background:
- Dermatophytes are fungi capable of surviving on the skin's keratinized layers.
- Fungal adherence and host adaptation are key to establishing infection.
- Natural infection occurs through direct contact with infectious fungal elements.
Purpose of the Study:
- To elucidate the mechanisms of dermatophyte infection.
- To understand host-pathogen interactions in cutaneous mycoses.
- To review host defense mechanisms against dermatophytes.
Main Methods:
- Review of existing literature on dermatophyte pathogenesis.
- Analysis of fungal adherence factors and host response pathways.
- Examination of immunological and non-immunological defense mechanisms.
Main Results:
- Dermatophytes utilize specific mechanisms to adhere to and penetrate host skin.
- Host immune response is primarily mediated by T-cells (delayed-type hypersensitivity).
- Antibody production does not confer protection against dermatophyte infections.
Conclusions:
- Dermatophyte infections involve adherence, penetration, and host immune responses.
- Cell-mediated immunity plays a crucial role in controlling fungal skin infections.
- Effective natural defenses against dermatophytes involve both immune and non-immune factors.
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