Mould Identification: A Virtual Self Assessment
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Unknown 54 = Epidemophyton floccosum
|A 27 year old male presented with a circular erythematous lesion on the inner thigh. Direct microscopy of skin scrapings revealed the presence of septate fungal hyphae breaking up into arthroconidia. The culture below was isolated.|
Tinea of the groin (tinea cruris) showing typical circular, erythematous lesions with raised advancing margins.
|Direct Microscopy (KOH mount)|
KOH mount of infected skin scales showing typical dermatophyte hyphae breaking up into arthroconidia.
Cultures of E. floccosum are usually greenish-brown or khaki coloured with a suede-like surface, raised and folded in the centre, with a flat periphery and submerged fringe of growth. Older cultures may develop white pleomorphic tufts of mycelium. A deep yellowish-brown reverse pigment is usually present.
Microscopic morphology of E. floccosum showing characteristic smooth, thin-walled macroconidia, which are often produced in, clusters growing directly from the hyphae.
Numerous chlamydoconidia are formed in older cultures. No microconidia are formed.
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