Assessment of use of microsatellite polymorphism analysis for improving spatial distribution tracking of echinococcus multilocularis.

• Main Authors: Knapp, J, Bart, J M, Glowatzki, M L, Ito, A, Gerard, S, Maillard, S, Piarroux, R, Gottstein, B
• Other Authors: Laboratoire Chrono-environnement (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC), Institute of Parasitology, Universität Bern / University of Bern (UNIBE), Asahikawa Medical University, Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de l'Ouest : Droit et Europe (IODE), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Infections Parasitaires : Transmission, Physiopathologie et Thérapeutiques (IP-TPT), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)-Service de Santé des Armées
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2007
• Subjects: MESH: Alaska; MESH: Animals; MESH: Europe; MESH: Genotype; MESH: Geography; MESH: Humans; MESH: Microsatellite Repeats; MESH: Molecular Epidemiology; MESH: Polymorphism; Genetic; Domestic; Wild; MESH: Asia; MESH: Canada; MESH: Cluster Analysis; MESH: Echinococcosis; Hepatic; MESH: Echinococcus multilocularis; [SDV.EE.SANT]Life Sciences [q-bio]/Ecology; environment/Health; Arctic; Alaska
• Online Access: https://hal.science/hal-01118448

International audience Alveolar echinococcosis (AE)--caused by the cestode Echinococcus multilocularis--is a severe zoonotic disease found in temperate and arctic regions of the northern hemisphere. Even though the transmission patterns observed in different geographical areas are heterogeneous, the nuclear and mitochondrial targets usually used for the genotyping of E. multilocularis have shown only a marked genetic homogeneity in this species. We used microsatellite sequences, because of their high typing resolution, to explore the genetic diversity of E. multilocularis. Four microsatellite targets (EmsJ, EmsK, and EmsB, which were designed in our laboratory, and NAK1, selected from the literature) were tested on a panel of 76 E. multilocularis samples (larval and adult stages) obtained from Alaska, Canada, Europe, and Asia. Genetic diversity for each target was assessed by size polymorphism analysis. With the EmsJ and EmsK targets, two alleles were found for each locus, yielding two and three genotypes, respectively, discriminating European isolates from the other groups. With NAK1, five alleles were found, yielding seven genotypes, including those specific to Tibetan and Alaskan isolates. The EmsB target, a tandem repeated multilocus microsatellite, found 17 alleles showing a complex pattern. Hierarchical clustering analyses were performed with the EmsB findings, and 29 genotypes were identified. Due to its higher genetic polymorphism, EmsB exhibited a higher discriminatory power than the other targets. The complex EmsB pattern was able to discriminate isolates on a regional and sectoral level, while avoiding overdistinction. EmsB will be used to assess the putative emergence of E. multilocularis in Europe.