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Related Experiment Videos

Macroconidial development and germination in Trichophyton mentagrophytes.

K Niimi1, M Niimi, K Harada

  • 1Department of Bacteriology, Kyushu Dental College, Kitakyushu, Japan.

The Journal of Investigative Dermatology
|February 1, 1988
PubMed
Summary

Trichophyton mentagrophytes macroconidia show remarkable longevity, with some remaining viable for 12 months. Optimal germination occurs across a broad temperature range and is tolerant to high salt concentrations.

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Area of Science:

  • Medical Mycology
  • Fungal Biology

Background:

  • Trichophyton mentagrophytes is a significant dermatophyte.
  • Understanding macroconidial development and longevity is crucial for fungal research.

Purpose of the Study:

  • To investigate macroconidial development and ageing in Trichophyton mentagrophytes.
  • To determine factors influencing macroconidial germination.

Main Methods:

  • Light and scanning electron microscopy were used to observe macroconidial morphology.
  • Macroconidial germination was assessed under various conditions, including different temperatures, NaCl concentrations, and environmental stresses.

Main Results:

  • Macroconidia developed thick-walled, spherical structures upon long-term cultivation.

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  • Viable germination was observed in 12-month-old macroconidia.
  • Optimal germination occurred between 15-37°C with low inoculum density.
  • Macroconidial germination demonstrated high tolerance to NaCl and could occur in distilled water.

    • Conclusions:

    • Trichophyton mentagrophytes macroconidia exhibit extended viability and resilience.
    • Environmental factors significantly influence macroconidial germination success.
    • These findings contribute to understanding fungal survival mechanisms.