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
The second case of Dioctophyme renale, the giant kidney worm, to be reported in the state of Iowa was found in a dog being used in a surgery class at Iowa State College, February 8, 1940.
Dunne, H. W.
"A Case of Dioctophyme Renale in a Dog,"
Iowa State University Veterinarian: Vol. 2
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol2/iss3/5