Causes Underlying Increased Incidence Of Broad Tapeworm In Man In North America

This paper is a report on an expedition made during July and August 1929 in the northern half of Minnesota and Canada to find proof that fish-eating dogs constitute an important reservoir of the broad tapeworm of man and proof of the successful experimental infestation of two bears with the broad tapeworm. Investigation demonstrated that dogs in the region extending from Ely, Minn. north into Canada are heavily infested and are largely responsible for the continued infestation of fish with the larvae. Numerous eggs were found in four of ten samples of feces of wild bears. Dogs and wild carnivora may cause the further distribution of this parasite into uninhabited, as well as heavily settled, regions in North America. Footnotes.