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
Psuedorabies or Aujeszky's Disease has been occurring enzootically in Iowa since its earliest discovery in 1930. As an infectious disease of cattle it is intimately associated with an implacable pruritis, giving rise to the descriptive term, "maditch." Of recent interest are two cases submitted to the Iowa Diagnostic Laboratory for autopsy.
Mattison, James R.
"Psuedorabies in the Bovine,"
Iowa State University Veterinarian: Vol. 14
, Article 9.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol14/iss2/9