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
Contagious Equine Metritis (CEM), a uterine infection of horses, has recently appeared in Central Kentucky. This is the first time the disease has been detected in the United States. Kentucky authorities report that two or three stallions may be infected, with possibly 40 mares having been exposed to the disease.
Iowa State University Veterinarian
"Contagious Equine Metritis,"
Iowa State University Veterinarian: Vol. 40
, Article 8.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol40/iss2/8