Characteristics: Common allergen Type I and III. Generally non-pathogenic, except for one species (Cladosporium Carrionii). Considered to have low toxicity.
Description: It is often found in soil, plant litter, as a plant pathogen, on leaf surfaces, or on old or decayed plants with an olive to brown coloration. It is disseminated as a dry spore by the wind. For indoor growth this fungus requires cool conditions. Most species of Cladosporium grow at 0°C and are generally associated with refrigerated foods. As an allergen, it has been known to cause Type I allergy symptoms including hay fever, asthma. It has also been known to cause Type III allergy symptoms including hypersensitivity pneumonitis called Hot tub lung, and Moldy wall hypersensitivity. As a pathogen, one species called Cladosporium Carrionii, has been known to have pathogenic effects, but is generally found in subtropical and tropical regions. This specific pathogenic species grows at 35-37°C. As a toxigenic agent, it produces cladosporin and emodin, neither of which is considered highly toxic.