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
Abscessation of the supra pharyngeal lymph nodes in beef cattle is not an uncommon condition but is difficult to treat. Corynebacterium pyogenes appears to be the most frequent cause of the condition.
"Surgical Treatment of a Suprapharyngeal Abscess in a Bovine,"
Iowa State University Veterinarian: Vol. 21
, Article 12.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol21/iss1/12