Table 1.

Current species in the genus Blastomyces.

Species	Geographic Range	Notes
B. dermatitidis	North America, including midwestern, southern, southeastern United States, the St. Lawrence Seaway, and midwestern Canadian provinces	By far the most common etiology of blastomycosis
B. gilchristii	Primarily in certain areas of Wisconsin and Ontario	Only distinguishable from B. dermatitidis by phylogenetic analysis
B. helicus	Western Canada and western United States	Rarely causes disease, mostly in immunocompromised hosts
B. percursus	Middle East, Africa	More bone and cutaneous manifestations than classic blastomycosis
B. emzantsi	South Africa	Geographically restricted, but presents similarly to B. percursus
B. parvus	North and South America, Eastern Europe, Australia	Causative agent of adiaspiromycosis in rodents; rare infection in humans
B. silverae	Western Canada	Not implicated in human disease