Diphyllobothrium stemmacephalum (Cestoda: Diphyllobothriidae) found from a harbor porpoise in northern Japan, with comments on a geographical gap with human infection cases in southern Japan. (April 2022)

• Record Type: Journal Article
• Authors: Katahira, Hirotaka; Matsuda, Ayaka T.; Maeda, Saki; Yoshida, Erika; Banzai, Azusa; Matsuishi, Takashi F.
• Is Part Of: Parasitology international. Volume 87(2022)
• Publication Date: 2022-04
• Subjects: Harbor porpoise -- Cestoda -- Diphyllobothrium stemmacephalum -- Genetic identification -- Distribution; Parasitology -- Periodicals; Parasites -- Periodicals; Parasitic Diseases -- Periodicals; Parasitology -- Periodicals; Parasitologie -- Périodiques; 571.99905
• DOI: 10.1016/j.parint.2021.102487
• Languages: English
• ISSNs: 1383-5769

Abstract

Abstract: Even though the cetacean tapeworm Diphyllobothrium stemmacephalum occurs in both cold and warm waters, human infections and final host occurrences have been confined to temperate areas in and near Japan. We recently obtained a strobila of this cestode that was excreted from a harbor porpoise accidentally caught offshore of Hokkaido of northern Japan. Genetic analysis of 28S rDNA and cox1 genes confirmed that the cestode was D. stemmacephalum . Our finding sets the northernmost record of D. stemmacephalum in the western Pacific, suggesting that the risk of human infections by this parasite in northern Japan deserves further attention. Graphical abstract: Unlabelled Image