Introduction Clinical Presentation Definition Distribution Etiology Index of Names Media & Methods Glossary Case Study References

Trichophyton equinum

Colonial Morphology	Microscopic Morphology Phase Contrast	Biochemical Reactions: BCP, SDA and Urease
Growth rate: moderately rapid Texture: suede like to downy, flat Thallus color: cream to pale yellow, deeps to pinkish or brownish in centre Reverse: deep yellow becoming red brown or dark pink, may produce brown soluble pigment	pyriform microconidia, lateral, may be produced on stalks rare club shaped macroconidia, smooth, thin walled	BCP: profuse, alkaline Urease: positive Vitamin requirement: nicotinic acid (#5) for var equinum or none for var autotrophicum Hair perforation: negative (var equinum) or positive (var autotrophicum)
Compare to and Differentiate from: downy T. mentagrophytes: vitamin requirements, hair perforation T. terrestre: growth at 35°C M. persicolor: vitamin requirements, hair, BCP	Etiology & Ecology zoophilic - horses worldwide rare in man etiology of other dermatophytes