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Abstract
Extract
The ciliate protozoan parasite Balantidium coli is considered by Hagan (Citation1947) commonly to infest swine, in which it occasionally produces, ulcerative colitis and diarrhoea. Humans are subject to infestation only rarely, and those most commonly affected associate with swine. A preliminary report by Norgarin (Citation1957) records the occurrence of B. coli in cattle, and Hayesand Jordan (Citation1956) record its presence in worm infested dogs.