what is alternaria

Alternaria is a genus of fungi found in various habitats such as soil, air, and plants. It is known to be a common allergen in humans, causing hay fever, hypersensitivity reactions, and sometimes leading to asthma. Some species of Alternaria are plant pathogens, causing significant damage to grains, fruits, and vegetables, and are responsible for 20 percent of agricultural yield losses. Additionally, Alternaria species can cause diseases in humans and animals, including subcutaneous phaeohyphomycosis, mycotic keratitis, and onychomycosis. They are also recognized as a common mold allergy, with Alternaria alternata being the most common clinical species. The genus comprises numerous species, and its spores are airborne and found in the soil, water, and indoor environments