Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Blastomycosis is a fungal disease caused by the dimorphic fungal organism, Blastomyces dermatidis. In the tissue or yeast form, the organisms appear as highly refractive, double walled yeast cells which vary from approximately 8-15 microns in diameter. The budding yeast cells show a very characteristic broad attachment. The mold phase is rapid growing and the hyphae branch at right angles.
Bledsoe, R. W. and Chastain, C. B.
"Blastomycosis in the Dog,"
Iowa State University Veterinarian: Vol. 42
, Article 6.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol42/iss3/6