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| Mosnier, Emilie; Roux, Emmanuel; Cropet, Claire; Lazrek, Yassamine; Moriceau, Olivier; Gaillet, Melanie; Mathieu, Luana; Nacher, Mathieu; Demar, Magalie; Odonne, Guillaume; Douine, Maylis; Michaud, Celine; Pelleau, Stephane; Djossou, Felix; Musset, Lise. |
| To implement future malaria elimination strategies in French Guiana, a characterization of the infectious reservoir is recommended. A cross-sectional survey was conducted between October and December 2017 in the French Guianese municipality of St Georges de l'Oyapock, located along the Brazilian border. The prevalence of Plasmodium spp. was determined using a rapid diagnostic test (RDT) and a polymerase chain reaction (PCR). Demographic, house locations, medical history, and biological data were analyzed. Factors associated with Plasmodium spp. carriage were analyzed using logistic regression, and the carriage localization was investigated through spatial cluster analysis. Of the 1,501 samples analyzed with PCR, positive results totaled 90 and 10 for... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00657/76880/78125.pdf |
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| Bodin, Stephanie; Molino, Jean-françois; Odonne, Guillaume; Bremond, Laurent. |
| In Amazonia, a growing body of studies has shown that rainforests were affected by human occupation in many areas during pre-Columbian times, inducing changes in their floristic compositions. The northern part of Amazonia, and in particular the Guiana Shield, is much less studied, although past human occupations have also been documented in this region. Therefore, the actual impact of pre-Columbian societies on Guianan forests is still poorly known. Here we explore 12 sites in the dense forest of Nouragues, central French Guiana, ranging from a priori non-anthropogenic to clearly anthropogenic, using an anthracological approach. Soil charcoals were radiocarbon dated to assess the chronology of the past human occupations, and identified to determine shifts... |
| Tipo: Text |
Palavras-chave: Charcoal; Anthracology; Lasiacisthicket; Liana forest; Amazonia; Pre-Columbian occupation; Historical ecology. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00606/71793/77312.pdf |
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| Falkowski, Michaël; Jahn-oyac, Arnaud; Odonne, Guillaume; Flora, Claudiane; Estevez, Yannick; Touré, Seindé; Boulogne, Isabelle; Robinson, Jean-charles; Béreau, Didier; Petit, Philippe; Azam, Didier; Coke, Maïra; Issaly, Jean; Gaborit, Pascal; Stien, Didier; Eparvier, Véronique; Dusfour, Isabelle; Houël, Emeline. |
| Natural products have proven to be an immeasurable source of bioactive compounds. The exceptional biodiversity encountered in Amazonia, alongside a rich entomofauna and frequent interactions with various herbivores is the crucible of a promising chemodiversity. This prompted us to search for novel botanical insecticides in French Guiana. As this French overseas department faces severe issues linked to insects, notably the strong incidence of vector-borne infectious diseases, we decided to focus our research on products able to control the mosquito Aedes aegypti. We tested 452 extracts obtained from 85 species originating from 36 botanical families and collected in contrasted environments against an Aedes aegypti laboratory strain susceptible to all... |
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Palavras-chave: Mosquito larvicides; Culicidae; Amazonian chemodiversity; Screening optimization; Quasi-Poisson generalized linear model; Chemical defense. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00514/62544/66894.pdf |
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| Odonne, Guillaume; Van Den Bel, Martijn; Burst, Maxime; Brunaux, Olivier; Bruno, Miléna; Dambrine, Etienne; Davy, Damien; Desprez, Mathilde; Engel, Julien; Ferry, Bruno; Freycon, Vincent; Grenand, Pierre; Jérémie, Sylvie; Mestre, Mickael; Molino, Jean-françois; Petronelli, Pascal; Sabatier, Daniel; Hérault, Bruno. |
| To decipher the long‐term influences of pre‐Columbian land occupations on contemporary forest structure, diversity and functioning in Amazonia, most of the previous research focused on the alluvial plains of the major rivers of the Amazon basin. Terra firme, i.e. non‐flooded forests, particularly from the Guiana Shield, are yet to be explored. In this study, we aim to give new insights into the subtle traces of pre‐Columbian influences on present‐day forests given the archaeological context of terra firme forests of the Guiana Shield. Following archeological prospects on 13 sites in French Guiana, we carried out forest inventories inside and outside archaeological sites and assessed the potential pre‐Columbian use of the sampled tree species using an... |
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Palavras-chave: Amazonian forest; Archaeology; Ethnobotany; Guiana Shield; Historical ecology; Pre-Columbian settlements; Ring-ditched hills. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00504/61558/65471.pdf |
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| Ogeron, Clemence; Odonne, Guillaume; Cristinoi, Antonia; Engel, Julien; Grenand, Pierre; Beauchene, Jacques; Clair, Bruno; Davy, Damien. |
| Background: Palikur Amerindians live in the eastern part of French Guiana which is undergoing deep-seated changes due to the geographical and economic opening of the region. So far, Palikur's traditional ecological knowledge is poorly documented, apart from medicinal plants. The aim of this study was to document ethnobotanical practices related to traditional construction in the region. Methods: A combination of qualitative and quantitative methods was used. Thirty-nine Palikur men were interviewed in three localities (Saint-Georges de l'Oyapock, Regina and Trois-Paletuviers) between December 2013 and July 2014. Twenty-four inventories of wood species used in traditional buildings were conducted in the villages, as well as ethnobotanical walks in the... |
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Palavras-chave: Oyapock; Palikur; Traditional technological knowledge; Amazonia; Annonaceae; Sapotaceae; Non-timber forest products; Architecture. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00440/55161/78947.pdf |
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| Rodrigues, Alice M. S.; Eparvier, Veronique; Odonne, Guillaume; Amusant, Nadine; Stien, Didier; Houel, Emeline. |
| Mankind is on the verge of a postantibiotic era. New concepts are needed in our battle to attenuate infectious diseases around the world and broad spectrum plant-inspired synergistic pharmaceutical preparations should find their place in the global fight against pathogenic microorganisms. To progress towards the discovery of potent antifungal agents against human pathologies, we embarked upon developing chemometric approach coupled with statistical design to unravel the origin of the anticandidal potential of a set of 66 essential oils (EOs). EOs were analyzed by GC-MS and tested against Candida albicans and C. parapsilosis (Minimal Inhibitory Concentration, MIC). An Orthogonal Partial Least Square (OPLS) analysis allowed us to identify six molecules... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00505/61647/65570.pdf |
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