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Stachybotrys sp.

Mitosporic fungus. Hyphomycetes.

Distribution

Ubiquitous;
cosmopolitan.
Approx. 15 species.

Where Found

Soil, decaying plant substrates, decomposing cellulose (hay, straw), leaf litter, and seeds. Growth not influenced by soil pH or copper; growth enhanced by manure.

Mode of Dissemination

Wet spore.
Insects, water splash.
Wind when dried out.

Allergen

Not well studied.
Type I allergies reported.

Potential Opportunist or Pathogen

No reports of human infection. (No species grow well at 37°C.)

Potential Toxin Production

Macrocyclic trichothecenes: verrucarin J, roridin E, satratoxin F, G & H, sporidesmin G, trichoverrol; cyclosporins, stachybotryolactone.
Stachybotrys mycotoxicosis: human toxicosis has been described; may be characterized by dermatitis, cough, rhinitis, itching or burning sensation in mouth, throat, nasal passages and eyes. The best described toxicoses are from domestic animals that have eaten contaminated hay and straw or inhaled infected material from contaminated bedding.

Growth Indoors

Commonly found indoors on wet materials containing cellulose, such as wallboard, jute, wicker, straw baskets, and other paper materials. (See “Characteristics: Growth/Culture”).
Aw=0.94

Industrial Uses

Not known.

Other Comments

Many human reports of Stachybotrys toxicosis are anecdotal. Stachybotrys mycotoxicosis is currently the subject of toxin research.

Used with permission from EMLab P&K

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