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Mould Identification: A Virtual Self Assessment

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Unknown 45 = Pleurostomophora richardsiae

Case History

Case History: A 25-year-old male renal transplant recipent presented with a dark coloured subcutaneous nodule on his leg, which later became ulcerated. The culture shown below was isolated.

Culture
Culture

Colonies grow rapidly, and are powdery to woolly or tufted, greyish-brown with a grey-brown to olivaceous-black reverse.
Microscopy
Microscopy

Microscopy

Microscopy

Phialides of P. richardsiae producing 2 types of conidia. (1) hyaline conidia, formed on inconspicuous, peg-like phialides on thin-walled hyphae; and (2) brown, thick-walled conidia formed on dark brown, slender, tapering phialides with flaring collarettes.
Comment: Pleurostomophora richardsiae is a soft rot fungus of  wood and is an uncommon cause of human infection.  However, cases of subcutaneous phaeohyphomycosis have been reported.

About Pleurostomophora Back to Virtual Assessment

What is your identification?

Acrophialophora fusispora
Pleurostomophora richardsiae
Phialophora verrucosa

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Dr David Ellis
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