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Registros recuperados: 8
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A river runs through it: The causes, consequences, and management of intraspecific diversity in river networks ArchiMer
Blanchet, Simon; Prunier, Jérôme G.; Paz‐vinas, Ivan; Saint‐pé, Keoni; Rey, Olivier; Raffard, Allan; Mathieu‐bégné, Eglantine; Loot, Géraldine; Fourtune, Lisa; Dubut, Vincent.
Rivers are fascinating ecosystems in which the eco‐evolutionary dynamics of organisms are constrained by particular features, and biologists have developed a wealth of knowledge about freshwater biodiversity patterns. Over the last 10 years, our group used a holistic approach to contribute to this knowledge by focusing on the causes and consequences of intraspecific diversity in rivers. We conducted empirical works on temperate permanent rivers from southern France, and we broadened the scope of our findings using experiments, meta‐analyses, and simulations. We demonstrated that intraspecific (genetic) diversity follows a spatial pattern (downstream increase in diversity) that is repeatable across taxa (from plants to vertebrates) and river systems. This...
Tipo: Text Palavras-chave: Conservation genetics; Dendritic networks; Eco‐evolutionary dynamics; Ecosystem services; Intraspecific diversity.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00617/72935/71954.pdf
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Environmental DNA for detecting Bulinus truncatus : A new environmental surveillance tool for schistosomiasis emergence risk assessment ArchiMer
Mulero, Stephen; Boissier, Jérôme; Allienne, Jean‐françois; Quilichini, Yann; Foata, Joséphine; Pointier, Jean‐pierre; Rey, Olivier.
Under ongoing climate changes, the development of large‐scale monitoring tools for assessing the risk of disease emergence constitutes an urging challenge. This is particularly the case for snail‐borne diseases such as the urogenital bilharziasis that emerged in Corsica and threat European countries. The expansion of this tropical disease mainly relies on the local presence of competent snail hosts such as Bulinus truncatus. Unfortunately, very little is known about the actual repartition of freshwater snails worldwide which makes new emergences difficult to predict. In this study, we developed two ready‐to‐use environmental DNA‐based methods for assessing the distribution of B. truncatus from water samples collected in the field. We used two approaches, a...
Tipo: Text Palavras-chave: Bulinus truncatus; Corsica; DdPCR; Environmental DNA; Environmental monitoring; QPCR; Schistosomiasis.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00593/70554/68723.pdf
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Epidemiological surveillance of schistosomiasis outbreak in Corsica (France): Are animal reservoir hosts implicated in local transmission? ArchiMer
Oleaga, Ana; Rey, Olivier; Polack, Bruno; Grech-angelini, Sébastien; Quilichini, Yann; Pérez-sánchez, Ricardo; Boireau, Pascal; Mulero, Stephen; Brunet, Aimé; Rogon, Anne; Vallée, Isabelle; Kincaid-smith, Julien; Allienne, Jean-françois; Boissier, Jérôme.
Environmental and anthropogenic changes are expected to promote emergence and spread of pathogens worldwide. Since 2013, human urogenital schistosomiasis is established in Corsica island (France). Schistosomiasis is a parasitic disease affecting both humans and animals. The parasite involved in the Corsican outbreak is a hybrid form between Schistosoma haematobium, a human parasite, and Schistosoma bovis, a livestock parasite. S. bovis has been detected in Corsican livestock few decades ago raising the questions whether hybridization occurred in Corsica and if animals could behave as a reservoir for the recently established parasite lineage. The latter hypothesis has huge epidemiological outcomes since the emergence of a zoonotic lineage of schistosomes...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00504/61566/65491.pdf
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Epigenetically facilitated mutational assimilation: epigenetics as a hub within the inclusive evolutionary synthesis ArchiMer
Danchin, Etienne; Pocheville, Arnaud; Rey, Olivier; Pujol, Benoit; Blanchet, Simon.
After decades of debate about the existence of non-genetic inheritance, the focus is now slowly shifting towards dissecting its underlying mechanisms. Here, we propose a new mechanism that, by integrating non-genetic and genetic inheritance, may help build the long-sought inclusive vision of evolution. After briefly reviewing the wealth of evidence documenting the existence and ubiquity of non-genetic inheritance in a table, we review the categories of mechanisms of parent-offspring resemblance that underlie inheritance. We then review several lines of argument for the existence of interactions between non-genetic and genetic components of inheritance, leading to a discussion of the contrasting timescales of action of non-genetic and genetic inheritance....
Tipo: Text Palavras-chave: Non-genetic inheritance; Inclusive heritability; Epigenetics; Central dogma; Genetic assimilation; Mutation randomness; Inclusive evolutionary synthesis.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00479/59037/62430.pdf
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Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinter ArchiMer
Mulero, Stephen; Rey, Olivier; Arancibia, Nathalie; Mas-coma, Santiago; Boissier, Jerome.
BackgroundGlobal changes promote the spread of infectious diseases worldwide. In this context, tropical urogenital schistosomiasis is now permanently established in Corsica since its first emergence in 2013. The local persistence of the tropical pathogens (schistosomes) responsible for urogenital schistosomiasis at such latitudes might be explained by (i) the presence of its intermediate host, the snail Bulinus truncatus, (ii) the recurrent local reseeding of schistosomes by their vertebrate hosts (either human or animal) every summer, and/or (iii) the maintenance and survival of schistosomes within their snail hosts over winter.MethodsIn this study we conducted an ecological experiment to assess the ability of temperate and tropical schistosome strains to...
Tipo: Text Palavras-chave: Schistosomiasis; Bulinus truncatus; Corsica; Persistence; Schistosoma haematobium; Temperature.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00509/62088/66275.pdf
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Population genetic structure of Schistosoma bovis in Cameroon ArchiMer
Djuikwo-teukeng, Felicite Flore; Simo, Alain Kouam; Allienne, Jean-francois; Rey, Olivier; Ngapagna, Arouna Njayou; Tchuem-tchuente, Louis Albert; Boissier, Jerome.
BackgroundSchistosomiasis is neglected tropical parasitic disease affecting both humans and animals. Due to the human health impact, population genetic studies have focused on the three main human-infecting schistosome species: Schistosoma mansoni, S. haematobium and S. japonicum. Here we present novel data on the population genetic structure of Schistosoma bovis, a highly widespread and prevalent schistosome infecting ruminants, and therefore of veterinary importance.MethodsAdult S. bovis were sampled in the two main abattoirs of Cameroon (Yaounde and Douala). Twenty-two cows originating from four distinct localities were sampled and a total of 218 parasites were recovered. All parasites were genotyped using a panel of 14 microsatellite markers and a...
Tipo: Text Palavras-chave: Schistosoma bovis; Barcoding; Population genetic structure.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00481/59267/62448.pdf
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Prevalence and Risk Factors for Schistosomiasis among Schoolchildren in two Settings of Côte d’Ivoire ArchiMer
Angora, Etienne K.; Boissier, Jérôme; Menan, Hervé; Rey, Olivier; Tuo, Karim; Touré, Andre O.; Coulibaly, Jean T.; Méité, Aboulaye; Raso, Giovanna; N’goran, Eliézer K.; Utzinger, Jürg; Balmer, Oliver.
Schistosomiasis is a parasitic disease affecting more than 250 million people, primarily in sub-Saharan Africa. In Côte d’Ivoire both Schistosoma haematobium (causing urogenital schistosomiasis) and Schistosoma mansoni (causing intestinal schistosomiasis) co-exist. This study aimed to determine the prevalence of S. haematobium and S. mansoni and to identify risk factors among schoolchildren in the western and southern parts of Côte d’Ivoire. From January to April 2018, a cross-sectional study was carried out including 1187 schoolchildren aged 5–14 years. Urine samples were examined by a filtration method to identify and count S. haematobium eggs, while stool samples were subjected to duplicate Kato-Katz thick smears to quantify eggs of S. mansoni and...
Tipo: Text Palavras-chave: Côte d’Ivoire; Prevalence; Risk factors; Schistosoma haematobium; Schistosoma mansoni; Schistosomiasis.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00508/61953/66043.pdf
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Schistosoma haematobium-Schistosoma mansoni Hybrid Parasite in Migrant Boy, France, 2017 ArchiMer
Le Govic, Yohann; Kincaid-smith, Julien; Allienne, Jean-francois; Rey, Olivier; De Gentile, Ludovic; Boissier, Jerome.
Schistosomiasis is frequently detected in persons entering Europe. In 2017, we detected a Schistosoma mansoni-Schistosoma haematobium hybrid parasite infection in a migrant boy from Cote d'Ivoire entering France. Because such parasites might be established in Europe, as illustrated by an outbreak on Corsica Island, vectors of these parasites should be investigated.
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00615/72740/71879.pdf
Registros recuperados: 8
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