Characteristics: Allergen Type I and Type III also considered to be pathogenic and toxigenic.
Description: Alternaria in one of the most common fungi worldwide. Its colonies are generally found in soil, dead organic debris, on foodstuffs, textiles, and weakened plants with a dark olive green to brown coloration with a velvety texture. It is disseminated as a dry spore through the wind. Most species of Alternaria do not grow at 98.6° C. As an allergen, it has been known to cause both Type I and Type III symptoms.
As a pathogen, it has been known to cause nasal lesions, subcutaneous lesions, and nail infections. The majority of infections occur in people with underlying disease or in those taking immunosuppressive drugs.
As a toxigenic agent, it produces alternariol (an antifungal), AME (metabolite), tenuazonic acid, and altertoxins. It can be used for biocontrol to kill weeds and plants.