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Unique genetic structure of the human tapeworm Dibothriocephalus latus from the Alpine lakes region – a successful adaptation?
- Source :
- Parasitology. 149:1106-1118
- Publication Year :
- 2022
- Publisher :
- Cambridge University Press (CUP), 2022.
-
Abstract
- Dibothriocephalus latus is the most frequent causative agent of fish-borne zoonosis (diphyllobothriosis) in Europe, where it is currently circulating mainly in the Alpine lakes region (ALR) and Russia. Three mitochondrial genes (cox1, cob and nad3) and 6 microsatellite loci were analysed to determine how is the recently detected triploidy/parthenogenesis in tapeworms from ALR displayed at the DNA level. A geographically distant population from the Krasnoyarsk Reservoir in Russia (RU-KR) was analysed as a comparative population. One or 2 alleles of each microsatellite locus was detected in plerocercoids from RU-KR, corresponding to the microsatellite pattern of a diploid organism. In contrast, 1–3 alleles were observed in tapeworms from ALR, in accordance with their triploidy. The high diversity of mitochondrial haplotypes in D. latus from RU-KR implied an original and relatively stable population, but the identical structure of mitochondrial genes of tapeworms from ALR was probably a consequence of a bottleneck typical of introduced populations. These results indicated that the diploid/sexually reproducing population from RU-KR was ancestral, located within the centre of the distribution of the species, and the triploid/parthenogenetically reproducing subalpine population was at the margin of the distribution. The current study revealed the allelic structure of the microsatellite loci in the triploid tapeworm for the first time.
- Subjects :
- Infectious Diseases
Animal Science and Zoology
Parasitology
Subjects
Details
- ISSN :
- 14698161 and 00311820
- Volume :
- 149
- Database :
- OpenAIRE
- Journal :
- Parasitology
- Accession number :
- edsair.doi...........a06ef82c781a1a84ce3857d014f721b0