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
On April 4, 1940, a Boston Terrier bitch, two years of age was presented at the Iowa State Clinic with a history of having had a vaginal discharge since her last estrus period in December. This discharge was quite copious and of a muco-purulent type. On the day of entrance her temperature was 102.2°, respiration 58, and pulse 140. After an examination with a vaginal speculum a diagnosis of pyometra was made. A hysterectomy was indicated.
Forland, L. M.
"Pyometra in a Bitch,"
Iowa State University Veterinarian: Vol. 2
, Article 11.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol2/iss3/11