Trichophyton soudanense

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Colonial Morphology	Microscopic Morphology Phase Contrast	Biochemical Reactions: BCP, SDA and Urease
Growth rate: slow to moderately rapid, stimulated at 35°C Texture: suede like, glabrous to velvety, flat to folded, submerged fringed border Thallus color: apricot orange, occasionally suffused with pink to red Reverse: apricot orange; sulfur yellow to orange brown Variant: purple Subcultures become cottony with yellow reverse	reflexive branching (grow forward and backward at acute angles), best near margin on BCP break up into arthroconidial fragments rare pyriform microconidia, solitary or in groups occasional macroconidia on BCP	BCP: alkaline, small zone of hydrolysis Urease: usually negative, sometimes positive Vitamin requirement: inconsistent Hair perforation: negative Lowenstein-Jensen: dark brown to black pigment
Compare to and Differentiate from: T. rubrum: pigmentation, BCP, reflexive branching T. tonsurans: vitamin requirements, clearing on BCP, reflexive branching M. ferrugineum: pigmentation on Lowenstein-Jensen, BCP, vitamin requirements T. violaceum: growth rate, clearing of BCP, reflexive branching T. verrucosum: growth rate, clearing of BCP, reflexive branching T. equinum: growth rate, sporulation T. megninii: BCP, vitamin requirements, reflexive branching	Etiology & Ecology anthrophilic Africa, occasionally North America, UK, Brasil scalp and body primarily "shower sites" etiology of other dermatophytes

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