Abstract
A phylogeographic study was carried out of Trichuris muris, nematode parasitizing Murinae rodents from the Muridae family, isolated from four different hosts and from different geographical regions of Europe by amplification and sequencing of the ITS1-5.8S-ITS2 fragment of the ribosomal DNA. T. muris was found in the Apodemus sylvaticus, Apodemus flavicollis, Mus domesticus, and Rattus rattus rodents. The molecular results confirm the presence of DNA polymorphisms among T. muris isolates from Europe. The present study shows two clear-cut geographical and genetic lineages: one of them is widespread from northern Spain (Catalonia) to Denmark (Western European region), while the second is widespread in the Eastern European region (Croatia, Rumania, and Turkey). These two genotypes can be easily distinguished by a PCR-RFLP analysis of this sequence with the ApalI restriction enzyme. Moreover, networks and phylogenetic reconstructions also reveal that T. muris from various Murinae rodents did not differentiate according to the host species that they parasitize. Furthermore, T. muris isolated from The Canary Islands revealed a typical haplotype (H6) only present in The Canary Islands and not in continental Europe. It is suggested that one haplotype from La Gomera Island is the ancestor of T. muris in the Canary Islands.
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Acknowledgements
We wish to thank Dr. Voitto Haukisalmi and Dr. Heikki Henttonen from the Finnish Forest Research Institute, Vantaa (Finland) who provided samples from different European regions. We also wish to thank Mr. Geoffrey Giddings for the critical reading of the manuscript. The research has been funded by three grants from the Ministry of Science and Technology (CGL2004-00630/BOS, CGL 2006-04937/BOS, CGL2008-01459/BOS).
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Callejón, R., de Rojas, M., Nieberding, C. et al. Molecular evolution of Trichuris muris isolated from different Muridae hosts in Europe. Parasitol Res 107, 631–641 (2010). https://doi.org/10.1007/s00436-010-1908-9
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DOI: https://doi.org/10.1007/s00436-010-1908-9