Bipolaris / Drechslera / Exserohilum  

Where Found Indoor building materials, plants, grasses
Allergen Type I allergies (hay fever, asthma)
Allergic fungal sinusitis
Pathogen Sinusitis

Bipolaris sp. Bipolaris is a plant parasite and some are pathogenic to grasses. This fungus can grow as a mold in semi-dry environments. Bipolaris has been reported to produce the mycotoxin sterig-matocystin that has been shown to cause liver and kidney damage when ingested by laboratory animals. This fungus is associated with phaeohyphomycosis, a disease consisting of a group of mycotic infections characterized by the presence of demataceous septate hyphae. Infections of the eyes and skin by black fungi could also be classified as phaeohyphomycosis). This fungus causes allergic fungal sinusitis, characterized by the presence of Bipolaris in the sinuses. In certain people with severe allergies, the large spores of this fungus can travel to the sinuses (upper respiratory tract), where they attach to the mucus and grow, producing an unrelenting allergic reaction that progressively and permanently damages the sinuses). Morphological characteristics of this genus are the production of brown conidia, several-celled, elliptical, straight or curved.


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