Date: 7 May 2013
Copyright:
Copyright B.Flannigan, R Samson & JD Miller (From Microorganisms in home and indoor work environments, Published by Taylor and Francis)
Notes:
Colonies on CYA 60 mm or more diam, usually covering the whole Petri dish, plane, velutinous, of low, usually subsurface, white mycelium, surmounted by a layer of closely packed, black conidial heads, ca 2-3 mm high; reverse usually pale, sometimes pale to bright yellow. Colonies on MEA varying from 30-60 mm diam, usually smaller than those on CYA and often quite sparse by comparison, otherwise similar. Colonies on G25N 18-30 mm diam, plane, velutinous, with white or pale yellow mycelium visible at the margins, otherwise similar to those on CYA; reverse pale or occasionally with areas of deep brown. No growth at 5°C. At 37°C, colonies 60 mm or more diam, covering the available space, sometimes sulcate, otherwise similar to those on CYA at 25°C.
Conidiophores borne from surface hyphae, 1.0-3.0 mm long, with heavy, hyaline, smooth walls; vesicles spherical, usually 50-75 µm diam, bearing closely packed metulae and phialides over the whole surface; metulae 10-15 µm long, or sometimes more; phialides 7-10 µm long; conidia spherical, 4-5 µm diam, brown, with walls conspicuously roughened or sometimes striate, borne in large, radiate heads.
Distinctive features
One of the best known of all fungal species, Aspergillus niger is distinguished by its spherical black conidia, derived from colonies which show little or no other colouring.
Images library
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Drug rashes: Drug interactions between steroids and anti-fungal drugs – (ecchymosis)
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Reference: Muco-cutaneous retinoid effects and facial erythema related to the novel triazole antifungal agent voriconazole. Denning, DW & Griffiths, CEM. Clin.Exp Dermatol 2001, 26(8), 648-53.
Courtesy of Dr D Denning, Wythenshawe Hospital, Manchester.(© Fungal Research Trust)
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Micrographs of A. niger conidia & conidial heads provided by Amaliya Stepanova, Head of Laboratory pathomorphology and cytology at Kashkin Research Institute, Russian Federation.
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Micrographs of A. terreus conidia & conidial heads provided by Amaliya Stepanova, , Head of Laboratory pathomorphology and cytology at Kashkin Research Institute, Russian Federation.
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Micrographs of A. fumigatus conidia & conidial heads provided by Amaliya Stepanova, , Head of Laboratory pathomorphology and cytology at Kashkin Research Institute, Russian Federation.
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Patients has history of ABPA complicating long standing asthma. His total IgE has fluctuated between 2,200 and 4,600 KU/L, his Aspergillus IgE between 36.3 and 65.4 kAU/L and Aspergillus IgG from 87-154 mg/L. He has been taking long term itraconazole.
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