Cestodes representing six species of the genus Diphyllobothrium Cobbold, 1858, were collected from naturally infected terrestrial mammals in Alaska during the period 1949-1970. Additional specimens were reared in experimentally infected animals. Of the species identified, viz., D. latum (Linnaeus, 1758). D. dendriticum (Nitzsch, 1824), D. Ianceolatum (Krabbe, 1865), D. ursi Rausch, 1954, D. dalliae Rausch, 1956, and D. alascense Rausch and Williamson, 1958, all but D. alascense were obtained from man
after treatment with quinacrine. D. latum occurred most commonly in man; D. ursi is reported for the first time from this host, and D. Ianceolatum in man was represented by a single plerocercoid. D. lanceolaturn, a characteristic parasite of phocids, was found also in dogs; D. alascense was obtained only from dogs. In man, rates of infection by Diphyllobothrium spp. were highest in the delta region of the Kuskokwim and Yukon rivers, western Alaska. Included is a description of D. latum and a discussion of morphologic variation, based upon specimens from Alaska, with a consideration of differential characters of the other species reported. Some biological characteristics of these cestodes are briefly discussed.
From: Fortuine, Robert et al. 1993. The Health of the Inuit of North America: A Bibliography from the Earliest Times through 1990. University of Alaska Anchorage. Citation number 2117.