Alternaria alternata is a fairly common indoor mould. In one study it was found in 87% of the homes examined. It is considered one of the most important fungal allergens. Alternaria alternata has been implicated as the cause of allergic diseases in people exposed to wood and sawdust during paper production in paper mills. It is regarded as the main cause of allergy and asthma in children aged 6–11 years.

It is known to produce over 70 various mycotoxins with tenuazonic acid being the most commonly known.




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