World of Dermatophytes: A Pictorial Prov Lab Home

Trichophyton megninii [Trichophyton kanei] [T. mentagrophytes]

Trichophyton megninii colonial morphology Trichophyton megninii phase contrast microscopy Trichophyton megninii biochemicals
Colonial Morphology Microscopic Morphology
Phase Contrast
Biochemical Reactions:
BCP, SDA and Urease
  • Growth rate: moderately rapid
  • Texture: suede like to cottony, widely spaced radial grooves
  • Thallus color: white, becoming pink to violet
  • Reverse color: wine red to red brown
  • pyriform microconidia
  • rare pencil shaped macroconidia
  • BCP: moderate to profuse growth, alkaline
  • Urease: positive in broth, may be negative in agar
  • Vitamin requirement: histidine (Trichophyton agar #7)
  • Hair perforation: negative
  • Red pigment

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Etiology & Ecology