Mould Identification: A Virtual Self Assessment
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Unknown 31 = Aphanoascus fulvescens
| Case History | |
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| A 4-year-old Australian Sea-lion from Kangaroo Island presented with scaly, cutaneous lesions on the back flipper. Skin scrapings showed the presence of fungal hyphae and the culture grew the fungus shown below. | |
| Direct Microscopy (KOH Parker ink) | |
KOH mount of infected skin scales showing typical dermatophyte-like hyphae breaking up into arthroconidia.
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| Culture | |
Colonies are moderately fast growing, white to tan with the production of numerous spherical, pseudoparenchymatous, buff to light brown cleistothecia (non-ostiolate ascocarps).
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| Microscopy | |
Aphanoascus fulvescens has a Chrysosporium anamorph showing typical pyriform to clavate-shaped conidia with truncated bases, which are formed either intercalary, laterally or terminally.
Asci are subspherical to ellipsoidal and eight-spored. Ascospores light brown, yellowish to pale brown in mass, irregularly reticulate to lens-shaped.
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Key Features: Keratinolytic ascomycete with a Chrysosporium anamorph.
Comment: Aphanoascus fulvescens is a soil keratinolytic ascomycete which occasionally causes dermatomycosis in man and animals. RG-2 organism.
What is your identification?
Arthroderma simii
Chaetomium globosum
Aphanoascus fulvescens
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