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
Polioencephalomalacia (PEM) is a significant feedlot cattle problem here in the midwest. Differentiation of this disease from other diseases that produce central nervous signs such as acute lead poisoning (ALP), thromboembolic meningoencephalomyelitis, hypomagnesemia, and rabies is important to the practitioner as he has to decide on the best course of therapy for recovery.
Sexton, J. W.; Hull, B. L.; and Belfrage, J.
"An Atypical Case of Polioencephalomalicia,"
Iowa State University Veterinarian: Vol. 33
, Article 8.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol33/iss1/8