Scott Weese, DVM, reviews study results on the dimorphic fungus Blastomyces dermatitidis, its prevalence and how dogs may speed up the process of diagnosis in humans.
Source: WormsandGerms Blog. April 20, 2020. Link. Blasto lives in two forms, therefore dimorphic, says Weese. In the environment it lives in the form of a mold, and its exposure to this form that can result in infection in people and animals. Once it finds its way into the body, it changes to a yeast form, which then grows and causes disease.