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Ulocladium sp.

Mitosporic fungus. Hyphomycetes.
Distribution Where Found Mode of Dissemination
Approx. 9 species.
Soil, dung, paint, grasses, fibers, wood, decaying plant material, paper, and textiles. Dry spore.
Allergen Potential Opportunist or Pathogen Potential Toxin Production
Type I allergies (hay fever, asthma).
Ulocladium cross-reacts with Alternaria, adding to the allergenic burden of Alternaria-sensitive patients.
Rare subcutaneous tissue infection. Not known.
Growth Indoors Industrial Uses Other Comments
Widespread. Found on gypsum board, paper, paint, tapestries, jute, other straw materials. Ulocladium has a high water requirement. Not known. None.
Characteristics: Growth/Culture Notes on Spore Trap Recognition Notes on Tape Lift Recognition
Grows well on all general fungal media. Colonies are dark brown to rusty brown, granular to velvety. Geniculate sporulating structures can be observed with the stereoscope. Distinctive brown spores. Young spores or spore fragments may be confused with Alternaria, Pithomyces, and others, although Alternaria usually has shades of olive green pigment. Distinctive, readily identifiable on direct observation. Certain species may form rudimentary beaks and short chains which may be confused with Alternaria.
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