Mould Identification: A Virtual Self Assessment
Excellent you have really done well.
Please find additional information below
Unknown 21 = Nannizzia gypsea
|A 50-year-old male, farmer presented with a large, circular, erythematous pustular lesion on the wrist. Epilated hairs showed the presence of fungal elements and the fungus shown below was isolated.|
A large, circular, erythematous pustular lesion on the wrist caused by N. gypsa.
KOH mount of infected hairs showing a large spored ectothrix invasion typically caused by N. gypsea.
On Sabouraud's dextrose agar, colonies are usually flat, spreading, suede-like to granular, with a deep cream to tawny-buff to pale cinnamon coloured red surface. Many cultures develop a central white downy umbo (dome) or a fluffy white tuft of mycelium and some also have a narrow white peripheral boarder. A yellow-brown pigment, often with a central darker brown spot, is usually produced on the reverse, however a reddish-brown reverse pigment may be present in some strains.
Cultures produce abundant, symmetrical, ellipsoidal, thin-walled, verrucose, 4-6 celled macroconidia. The terminal or distal ends of most macroconidia are slightly rounded, while the proximal ends (point of attachment to hyphae) are truncate. Numerous clavate shaped microconidia are also present, but these are not diagnostic.
What is your identification?