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Thomas B. Magath, M.D.
JAMA. 1928;90(20):1650. doi:10.1001/jama.1928.02690470056033.
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To the Editor:  —The recent article by Vergeer (The Journal, March 3, p. 673) prompts me to call attention to my experiments on Diphyllobothrium latum, the broad tapeworm (Minnesota Med.10:614 [Oct.] 1927). Since my report was the first demonstration of the fact that North American fishes act as hosts for this worm, Vergeer's report may be looked on as confirmation of my observations. In my report it was indicated that I had evidence of the fact that there was an endemic area in and about Winnipeg, Manit. Since then I have obtained wall-eyed pike from Lake Winnipeg and have found larvae in a great percentage of them, which when fed to dogs produced typical tapeworms of the species D. latum. The importance of this is apparent when one learns that a great proportion of the wall-eyed pike sold in the middle western markets come from Canadian lakes and


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