Mitosporic fungus. Hyphomycetes.
Soil, good stuffs, hay, textiles. Grows on salted fish.
Wallemia grows on relatively dry surfaces; found on wood in crawl spaces. Common in mattress dust; may colonize human skin scales.
Wallemia is a keratinophilic, osmophilic fungus (grows on highly concentrated solutions e.g. salt and sugar).
Type I allergies (hay fever, asthma).
Rare human abscess reported.
Walleminol, tryptophol and UCA 1064-beta.
Poor growth on general fungal media. Grows on specialized fungal media with high osmotic pressure. Forms very small tan elevated colonies on DG18 and MEA. While an occasional colony will appear on malt agar, Wallemia may be missed when this is the only media used.
Very small cubical (initially) light brown spores formed in chains of four. Recognizable when young, fresh, and when still in chains.
Distinctive and identifiable on tape lifts. Observation of sporulating structures may require 1000X magnification (oil immersion).