1. Taxonomic position and geographical distribution of the common sheep G1 and camel G6 strains of Echinococcus granulosus in three African countries
- Author
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Jean-Mathieu Bart, P. Koskei, Renaud Piarroux, S. Maillard, Jenny Knapp, M. C. Benchikh-Elfegoun, Bruno Gottstein, Institut de l'Ouest : Droit et Europe (IODE), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), 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, University of Bern, 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, Institut de l'Ouest : Droit et Europe ( IODE ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), 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-Université de Montpellier ( UM ), Millon, Laurence, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Service de Santé des Armées-Assistance Publique - Hôpitaux de Marseille (APHM)-Aix Marseille Université (AMU)-Institut de Recherche pour le Développement (IRD)
- Subjects
MESH : Algeria ,MESH : Classification ,MESH : Echinococcosis ,MESH: Echinococcus granulosus ,Animal Diseases ,030308 mycology & parasitology ,0302 clinical medicine ,MESH: Demography ,MESH : Mauritania ,MESH: Animals ,Echinococcus granulosus ,MESH: Phylogeny ,Phylogeny ,0303 health sciences ,630 Agriculture ,Phylogenetic tree ,biology ,MESH : Animal Diseases ,Mauritania ,MESH: Camels ,General Medicine ,Classification ,MESH: Classification ,Infectious Diseases ,Taxonomy (biology) ,MESH: Algeria ,MESH : Ethiopia ,MESH: Mauritania ,MESH : Demography ,Camelus ,030231 tropical medicine ,Cestoda ,Zoology ,MESH: Sheep ,MESH: Ethiopia ,Bovidae ,MESH : Sheep ,[ SDV.EE.SANT ] Life Sciences [q-bio]/Ecology, environment/Health ,03 medical and health sciences ,MESH: Echinococcosis ,Echinococcosis ,Phylogenetics ,parasitic diseases ,Animals ,Humans ,Helminths ,[SDV.EE.SANT] Life Sciences [q-bio]/Ecology, environment/Health ,Demography ,[SDV.EE.SANT]Life Sciences [q-bio]/Ecology, environment/Health ,Sheep ,MESH: Humans ,General Veterinary ,MESH : Camels ,MESH : Echinococcus granulosus ,MESH : Humans ,MESH : Phylogeny ,biology.organism_classification ,MESH: Animal Diseases ,Echinococcus ,Algeria ,Insect Science ,Parasitology ,Ethiopia ,MESH : Animals - Abstract
International audience; The taxonomic and phylogenetic status of Echinococcus granulosus strains are still controversial and under discussion. In the present study, we investigated the genetic polymorphism of E. granulosus isolates originating from three countries of Africa, including a region of Algeria, where the common G1 sheep and the camel G6 strains coexist sympatrically. Seventy-one hydatid cysts were collected from sheep, cattle, camels, and humans. Two mitochondrial markers (cox1 and nad1) were used for strain identification. Two nuclear markers (actII and hbx2) were used to study the possible occurrence of cross-fertilization. Despite the heterogeneity observed among the G1 isolates, they were all localized within one robust cluster. A second strong cluster was also observed containing all of the G6 isolates. Both strains appeared as two distinct groups, and no cases of interbreeding were found. Thus, the attribution of a species rank can be suggested. We also found the Tasmanian sheep G2 strain for the first time in Africa. Because of the slight variations observed between the common sheep and the Tasmanian sheep strains, further studies should be carried out to elucidate the epidemiological relevance of this genetic discrimination.
- Published
- 2007
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