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
Besides providing nutrition and pleasure [food] can also serve as a vehicle for noxious substances to enter the body. It serves as a source of food poisoning, a group of illnesses that strikes over two million people every year. These illnesses are traceable to food containing bacteria or toxins they produce, some harmful chemicals, poisonous plants and animals, or certain animal parasites.
Iowa State University Veterinarian: Vol. 43
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol43/iss1/7