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Teleomorphs and mating types in Trichophyton mentagrophytes complex.
Acta Universitatis Palackianae Olomucensis Facultatis Medicae
|January 1, 1989
Summary
Most Trichophyton mentagrophytes strains isolated from dermatophytosis cases were Arthroderma benhamiae, predominantly mating type +. No links were found between fungal form, mating type, or disease characteristics.
Area of Science:
- Mycology
- Dermatology
- Medical Microbiology
Background:
- Dermatophytosis is a common fungal infection.
- Trichophyton mentagrophytes is a significant etiological agent.
- Understanding mating types is crucial for fungal genetics and epidemiology.
Purpose of the Study:
- To classify Trichophyton mentagrophytes isolates based on their teleomorph.
- To determine the mating types of these isolates.
- To investigate potential correlations between mating type, morphology, and pathogenicity.
Main Methods:
- Isolation of Trichophyton mentagrophytes from human and animal dermatophytosis cases.
- Teleomorphic classification using crossing experiments and reference strains.
- Mating type determination via sexual stimulation and hybridization tests.
- Cultivation of morphological variants from conidia.
Main Results:
- 41 out of 132 strains were identified as Arthroderma benhamiae, with 40 of mating type + and 1 of mating type -.
- 10 strains were identified as Arthroderma vanbreuseghemii (3 mating type +, 7 mating type -).
- No significant correlations were found between anamorphic variety, teleomorph, mating type, dermatophytosis localization, or pathogenicity.
Conclusions:
- Arthroderma benhamiae is prevalent among clinical Trichophyton mentagrophytes isolates.
- The study highlights an unequal distribution of mating types in clinical isolates.
- Further research is needed to understand the reasons behind mating type imbalances in dermatophytes.