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Case report. Trichophyton mentagrophytes var. nodulare causing tinea pedis
Mycoses
|January 5, 2002
Summary
This study identifies the rare fungus Trichophyton mentagrophytes var. nodulare from a tinea pedis case. Key features include distinct pigmentation and colony morphology, aiding in its identification for clinical and research purposes.
Area of Science:
- Mycology
- Dermatology
- Medical Microbiology
Background:
- Trichophyton mentagrophytes var. nodulare is a rare anthropophilic dermatophyte.
- It is implicated in causing tinea and onychomycosis.
- Previous identification relied on phenotypic characteristics, with limited molecular data.
Observation:
- A strain of T. mentagrophytes var. nodulare was isolated from a patient with tinea pedis.
- The fungus exhibited deep yellow-orange pigmentation released from the mycelium.
- Colonies showed flat growth and formed nodular bodies.
Findings:
- Physiological tests and culture media were used to characterize the isolate.
- Supplementation with 3% NaCl on Sabouraud glucose agar reduced aerial mycelium and promoted conidia formation.
- This study provides phenotypic data for T. mentagrophytes var. nodulare, a fungus lacking prior DNA-based identification.
Implications:
- Accurate identification of this rare dermatophyte is crucial for effective treatment of fungal infections.
- The findings contribute to the understanding of T. mentagrophytes var. nodulare's morphology and growth requirements.
- Further research, including DNA analysis, is warranted to confirm its taxonomic position and prevalence.