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Experimental dermatophytoses produced by E. floccosum in guinea pigs
Mycopathologia
|April 1, 1987
Summary
Three Epidermophyton floccosum strains caused mild lesions in guinea pigs, unlike other tested strains. Microbiological and histopathological methods confirmed the limited infection, with no crusting or hair loss observed.
Area of Science:
- Medical Mycology
- Veterinary Dermatology
- Infectious Diseases
Background:
- Dermatophytoses are superficial fungal infections.
- Epidermophyton species are known causative agents of human dermatophytosis.
- Guinea pigs are a common model for studying dermatophyte infections.
Purpose of the Study:
- To evaluate the pathogenicity of 17 Epidermophyton strains in guinea pigs.
- To characterize the lesions produced by pathogenic Epidermophyton strains.
- To assess the efficacy of specific strains in establishing infection.
Main Methods:
- Experimental inoculation of guinea pig skin with 17 Epidermophyton strains.
- Clinical observation for lesion development (onset, crusting, alopecia).
- Microbiological and histopathological examination of infected skin.
Main Results:
- Only three strains of Epidermophyton floccosum induced lesions.
- Lesions appeared 5-7 days post-inoculation without crusting or alopecia.
- E. floccosum var. nigricans and E. stockdaleae did not cause infection.
Conclusions:
- Limited pathogenic potential observed among the tested Epidermophyton strains.
- E. floccosum strains showed variable infectivity in the guinea pig model.
- Further investigation needed for specific strain virulence factors.