There is a great book out there: Dog Owner's Home Veterinary Handbook, 4th edition. Here is what it states on Blastomycosis:
This systemic fungal disease occurs along the eastern seaboard, in the Great Lakes region and the Mississippi, Ohio, and Missouri River valleys. The fungus is associated with moist, rotting organic debris protected from sunlight and enriched with bird droppings, particularly those of pigeons. The disease is acquired by inhaling infected spores. Dogs are considerably more susceptible than are humans. Most cases of acute canine blastomycosis involve the respiratory system and cause bronchopneumonia. About 40% of cases involve the eyes and skin, producing signs similar to those of cryptococcosis. Weight loss and lamenuess may also be noted. Microscopic identification of organisms in transtracheal washings or in fluid aspirated from infected tissues is the most efficient way to make the diagnosis. In difficult cases, biopsy and culture may be needed. Serologic tests also are available. Treatment: A combination of amphotericin B and one of the imidazoles appears to offer the best chance of successful treatment. Months of treatment are required and some dogs may relapse months to years later. Hope this is helpful!

Hi, I have two Basenji's, my girl is now 10 years old and her name is Mandi, I adopted her from one of the Basenji rescue's around 6 years ago. My other Basenji is a "boy", his name is Rickie and is now 3 years old. I also adopted him. He was a pistol at first, always wanting to attack and growl, but with love and consistent assurance he has come around. I have a concern for Rickie, about 8 months ago he started loosing his hair, around the neck, along the sides of his body, his stomach and at the back of his flanks. He does not itch. I have him on a "no grain" dry food with organic ground beef (cooked). I also have him on Calif. Naturals, which is a supplement with the "good oils" and stuff and also a supplement called Solid Gold Seameal, both of which were recommended by the rescue. Nothing has helped! I had him tested this week for Hypothroidism by asking the Vet to take a T4 test called the FT4 by equilibrium dialysis. This came out NORMAL! Rickie is still a little grouchy and gets cold easily. One more thing, the skin under the hair is now very dark. Does anyone know what this could be or what caused it? Better yet, what shall I do now?