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Chaetomium
Wed, 08/19/2009 - 10:52 — aemtek
Genus:
Chaetomium
Distribution:
About 81 species reported worldwide, cosmopolitan, abundant.
Substrate:
Isolated from various substrates, including soil, wood, seed, straw, dung, and decaying plant material. Species of Chaetomium are important decay agents for cellulose, also causing soft rot in wood and fruit rot in apple.
Dispersal:
Spores are actively released and dispersed by wind, water, and insect activity.
Indoor Occurance:
Often found indoors, especially in water damaged buildings, on wet paper products, textile, drywall, wood, and other cellulosic materials. Aw = 0.90. Often isolated with Stachybotrys.
Allergenicity:
Possibly allergenic.
Pathogenicity:
Rarely causes subcutaneous or deep infection.
Notes On Identification:
Spores are distinguisable on spore trap and surface samples. Species identification requires mycological examination of sporulating cultures or molecular methods. Common species: C. globosum, ascospore 9-12 x 6-7 µm. C. elatum, ascospore 12-14 x 7-9 µm.
Spore TrapIdentification:
Ascospores olive brown to dark brown, often lemon shaped in face view, unicellular, smooth, with thick walls and apical germ pore, binucleate. Common species: C. globosum, ascospore 9-12 x 6-7 µm. C. elatum, ascospore 12-14 x 7-9 µm.
SporeTrap:
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