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[Experimental dermatomycosis, a clinico-pathological study]

J García de Lomas, F Rodriguez, V Ortega

    Mycopathologia
    |December 11, 1981
    PubMed
    Summary
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    Reinfecting rabbits with T. mentagrophytes and T. rubrum showed that T. mentagrophytes caused more severe infections. However, reinfection resulted in less intense and shorter-lasting lesions for both fungal species.

    Area of Science:

    • Medical Mycology
    • Dermatology
    • Veterinary Dermatology

    Background:

    • Tinea infections are common superficial fungal infections.
    • Understanding reinfection dynamics is crucial for effective treatment strategies.
    • Trichophyton species are primary causative agents of dermatophytosis.

    Purpose of the Study:

    • To investigate the impact of reinfection with Trichophyton mentagrophytes var granulosum and Trichophyton rubrum on previously resolved lesions in a rabbit model.
    • To compare the severity and duration of infections caused by reinoculation of these two dermatophyte species.

    Main Methods:

    • Experimental infection model using rabbits.
    • Reintroduction of T. mentagrophytes var granulosum and T. rubrum into resolved lesions.

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  • Clinical, mycological, and histopathological assessments over 16 weeks.

    • Main Results:

    • Trichophyton mentagrophytes var granulosum induced a more severe infection compared to Trichophyton rubrum.
    • Clinical lesions resulting from reinoculation were observed to be less intense and of shorter duration than primary infections.
    • Histopathological findings correlated with clinical observations regarding infection severity.

    Conclusions:

    • The rabbit model provides insights into the host-pathogen interactions during dermatophyte reinfection.
    • Prior infection and resolution may confer some level of resistance to subsequent challenges with the same dermatophyte species.
    • Differences in virulence exist between T. mentagrophytes var granulosum and T. rubrum in this experimental setting.