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| Kincaid-smith, Julien; Boissier, Jerome; Allienne, Jean-francois; Oleaga, Ana; Djuikwo-teukeng, Felicite; Toulza, Eve. |
| For scientists working on gonochoric organisms, determining sex can be crucial for many biological questions and experimental studies, such as crossbreeding, but it can also be a challenging task, particularly when no sexual dimorphism is visible or cannot be directly observed. In metazoan parasites of the genus Schistosoma responsible for schistosomiasis, sex is genetically determined in the zygote with a female heterogametic ZW/ZZ system. Adult flukes have a pronounced sexual dimorphism, whereas the sexes of the larval stages are morphologically indistinguishable but can be distinguished uniquely by using molecular methods. Therefore, reliable methods are needed to identify the sex of larvae individuals. Here, we present an endpoint PCR-based assay using... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00372/48333/71858.pdf |
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| Rey, Olivier; Toulza, Eve; Chaparro, Cristian; Allienne, Jean-françois; Kincaid-smith, Julien; Mathieu-begné, Eglantine; Allan, Fiona; Rollinson, David; Webster, Bonnie L.; Boissier, Jérôme. |
| Hybridization is a fascinating evolutionary phenomenon that raises the question of how species maintain their integrity. Inter-species hybridization occurs between certain Schistosoma species that can cause important public health and veterinary issues. In particular hybrids between Schistosoma haematobium and S. bovis associated with humans and animals respectively are frequently identified in Africa. Recent genomic evidence indicates that some S. haematobium populations show signatures of genomic introgression from S. bovis. Here, we conducted a genomic comparative study and investigated the genomic relationships between S. haematobium, S. bovis and their hybrids using 19 isolates originating from a wide geographical range over Africa, including samples... |
| Tipo: Text |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00678/79020/81421.pdf |
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| 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... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00504/61566/65491.pdf |
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| Kincaid-smith, Julien; Mathieu-bégné, Eglantine; Chaparro, Cristian; Reguera-gomez, Marta; Mulero, Stephen; Allienne, Jean-francois; Toulza, Eve; Boissier, Jérôme; Lamberton, Poppy H. L.. |
| Species usually develop reproductive isolation mechanisms allowing them to avoid interbreeding. These preventive barriers can act before reproduction, “pre-zygotic barriers”, or after reproduction, “post-zygotic barriers”. Pre-zygotic barriers prevent unfavourable mating, while post-zygotic barriers determine the viability and selective success of the hybrid offspring. Hybridization in parasites and the underlying reproductive isolation mechanisms maintaining their genetic integrity have been overlooked. Using an integrated approach this work aims to quantify the relative importance of pre-zygotic barriers in Schistosoma haematobium x S. bovis crosses. These two co-endemic species cause schistosomiasis, one of the major debilitating parasitic diseases... |
| Tipo: Text |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00693/80481/83621.pdf |
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