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Related Experiment Videos

Dermatrophye test medium: evaluation with nondermatophytic pathogens.

I F Salkin

    Applied Microbiology
    |August 1, 1973
    PubMed
    Summary

    Dermatophyte Test Medium (DTM) shows rapid color changes with many fungi, not just dermatophytes. This can lead to misidentification of zoopathogenic fungi in clinical settings.

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    Area of Science:

    • Medical Mycology
    • Clinical Microbiology

    Background:

    • Dermatophyte Test Medium (DTM) is commonly used for identifying dermatophytes.
    • Accurate identification of fungal pathogens is crucial for effective treatment of human skin lesions.

    Purpose of the Study:

    • To quantitatively evaluate fungal growth and color change on DTM by zoopathogenic fungi.
    • To assess the potential for misidentification of fungi on DTM.

    Main Methods:

    • Twenty-five strains of zoopathogenic fungi were cultured on DTM.
    • Fungal growth and color change on DTM were quantitatively assessed.
    • Colonial morphology was observed.

    Main Results:

    • DTM partially suppressed nondermatophyte growth, with comparable growth to dermatophytes in many cases.
    • All dermatophytes caused rapid color change on DTM.
    • Several nondermatophytic pathogens also induced rapid and intense color changes on DTM.

    Conclusions:

    • The rapid color change and colonial morphology on DTM can lead to misidentification of nondermatophytic pathogens as dermatophytes.
    • Clinical interpretation of DTM results requires careful consideration of fungal morphology and growth characteristics.

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