Aspergillus photo by Adrian J. Hunter
Molds and mildews are common contaminants of food and medicinal plants like cannabis. These filamentous fungi produce a variety of toxins, including afalotoxins which cause cancer and vomitoxin which causes intestinal distress. Molds are of special concern for individuals who have had organ translants or who are undergoing cancer treatment.
Human Disease: A number of molds can cause human disease, especially in individuals undergoing cancer treatment or who have had organ transplants. For example, Aspergillus species can cause fatal pneumonias, as can members of the genus Histoplasma. The fungus Sporothrix schenckii can cause skin ulcers and can infect the lymph system, causing large painful swellings of the lymph nodes.