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
Inclusion Body Rhinitis (IBR) is a viral disease of swine characterized by large basophilic intranuclear inclusion bodies in epithelial and reticular cells. It has been found in pigs in North American, Europe, Japan, Australia and Russia since it was first described in England by Done. The causative agent is a member of the herpes family of viruses and is classified as a cytomegalovirus.
Trembly, Kent J. and McKean, J. D.
"Inclusion Body Rhinitis of Swine,"
Iowa State University Veterinarian: Vol. 39
, Article 3.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol39/iss1/3