Mould Identification: A Virtual Self Assessment
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Unknown 77 = Paraphyton cookei
|A veterinarian submitted hair and skin scales from dog. Direct microscopy was negative however the culture seen below was isolated.|
Colonies are flat, spreading, buff to pale brown, powdery to suede-like, with slightly raised and folded centre and some radial grooves. Reverse pigment dark reddish brown.
Numerous large, very thick-walled, echinulate (rough) elliptical macroconidia with predominantly 5-6 septa but may be from 2-8 septa. Occasional spirals may be seen. Moderate numbers of mainly slender clavate with some pyriform macroconidia are present. The macroconidia are quite characteristic and diagnostic of P. cookei and further tests are not necessary. The thick walls and usually larger size of the macroconidia distinguished P. cookei from M. gypseum. RG-1 organism.
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