Genetic diversity and intercontinental dispersal of temperate and subarctic populations of Dibothriocephalus dendriticus (Cestoda; Diphyllobothriidea), a causative agent of dibothriocephalosis
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
39800305
DOI
10.1016/j.ijpara.2025.01.002
PII: S0020-7519(25)00002-5
Knihovny.cz E-resources
- Keywords
- Broad tapeworm, Cox1, Diphyllobothriosis, Diphyllobothrium dendriticum, Fish-borne zoonosis, Microsatellite loci, Migratory routes, Mitochondrial DNA,
- MeSH
- Cestoda * genetics classification MeSH
- Cestode Infections * veterinary parasitology epidemiology MeSH
- Phylogeography MeSH
- Genetic Variation * MeSH
- Haplotypes MeSH
- Microsatellite Repeats MeSH
- Fish Diseases parasitology MeSH
- Gene Flow MeSH
- Animals MeSH
- Check Tag
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Geographicals
- Europe MeSH
- South America MeSH
- North America MeSH
The diphyllobothriid tapeworm Dibothriocephalus dendriticus, one of the causative agents of the fish-borne zoonosis dibothriocephalosis, is mainly distributed in the Arctic/subarctic and temperate zones of the Northern Hemisphere (Europe, North America, and Asia), but also in the southern cone region of South America (Patagonia). The genetic structure and gene flow among 589 individuals of D. dendriticus, representing 20 populations, were studied using the mitochondrial cox1 gene as the first choice marker and 10 polymorphic nuclear microsatellite loci as a dominant molecular tool. The haplotype network of 30 cox1 haplotypes and Principal Coordinate Analysis/Structure analysis based on microsatellite data revealed close genetic relationships among populations within continents, namely northern and northwestern Europe (Norway, Finland, and UK/Scotland), North America (USA/Alaska, USA/Oregon, and Greenland), and South America (Argentina and Chile). The population from Iceland, located on the Mid-Atlantic Ridge between North America and Europe, was related to both Europe and North America. The mixed Nearctic and Palaearctic origin of D. dendriticus in Iceland was confirmed by a coalescent-based analysis of the microsatellite loci (in Migrate software). The most likely scenarios suggested that the Icelandic population is a genetic admixture of tapeworms from northwestern Europe and USA/Alaska. These findings corresponded with the distribution and migratory routes of piscivorous birds of the family Laridae, the main definitive hosts of D. dendriticus. The origin of an apparently non-native population of D. dendriticus in Patagonia was investigated in detail. The two most plausible hypotheses based on Migrate analysis represented different scenarios. One of them points to a European origin of the Patagonian population, the other to a North American origin. Future research with more extensive and a geographically broader sampling set is recommended to trace dispersal routes of D. dendriticus in Patagonia.
Department of Biological Sciences University of Bergen P O Box 7803 N 5020 Bergen Norway
Institute for Experimental Pathology University of Iceland Keldnavegur 3 IS 112 Reykjavík Iceland
Institute of Parasitology Slovak Academy of Sciences Hlinkova 3 04001 Košice Slovakia
Medirex a s Galvaniho 17 C P O Box 143 82016 Bratislava Slovakia
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