Blastomyces dermatitidis is a type of fungus that can cause a disease known as blastomycosis. This fungus is typically found in moist soil and decaying organic matter, particularly in certain regions of North America. When inhaled, it can lead to respiratory issues and other systemic symptoms. Infection often occurs in individuals who work or spend time outdoors in areas where the fungus is prevalent. Symptoms may include cough, fever, and chest pain. Diagnosis usually involves laboratory tests, and treatment typically requires antifungal medications to help eliminate the infection.