Susceptibility of Trichopyton mentagrophytes to Visible Light Wavelengths.

Objective: To determine whether a blue light (405 nm) could inhibit the growth of Trichopyton mentagrophytes without using a photosensitizing material as part of the treatment protocol.

Design: Basic physiologic randomized trial using laboratory specimens (T mentagrophytes).

Interventions/methods: Plated on a growth medium, T mentagrophytes were exposed to 3 to 5 administrations of blue light at 20 J/cm over 28 hours.