Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments
Mass mortality events affecting the Pacific oyster Crassostreae gigas on French coasts since 2008 have been associated to some Vibrio species. These mortalities, particularly severe and sudden in the mediterranean lagoons, can reach 80 to 100% of the oyster production threatening the sustainability...
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ftsorbonneuniv:oai:HAL:tel-02316309v1 2024-09-15T18:29:05+00:00 Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments Développement d'outils analytiques innovants pour le suivi des populations de Vibrio dans les environnements aquatiques Silva, Elise Da Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM) PIERRE FABRE-EDF (EDF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Perpignan Lise Barthelmebs Julia Baudart-Lenfant 2017-12-08 https://theses.hal.science/tel-02316309 https://theses.hal.science/tel-02316309/document https://theses.hal.science/tel-02316309/file/These_DaSilva_Elise_2017corr.pdf fr fre HAL CCSD NNT: 2017PERP0057 tel-02316309 https://theses.hal.science/tel-02316309 https://theses.hal.science/tel-02316309/document https://theses.hal.science/tel-02316309/file/These_DaSilva_Elise_2017corr.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-02316309 Ecologie, Environnement. Université de Perpignan, 2017. Français. ⟨NNT : 2017PERP0057⟩ Environmental monitoring Aquatic ecosystems Vibrio spp Genosensors Quantitative real-time PCR Surveillance environnementale Écosystèmes aquatiques Génocapteurs PCR quantitative en temps réel [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/doctoralThesis Theses 2017 ftsorbonneuniv 2024-07-25T23:48:02Z Mass mortality events affecting the Pacific oyster Crassostreae gigas on French coasts since 2008 have been associated to some Vibrio species. These mortalities, particularly severe and sudden in the mediterranean lagoons, can reach 80 to 100% of the oyster production threatening the sustainability of this activity. An environmental monitoring of these bacteria appears essential and, for this purpose, innovative analytical methods have to be developed as alternative to classical techniques, in order to allow the rapid and in real time monitoring of Vibrio in the coastal aquatic environments. In this context, the objective of the thesis was to design genosensors as analytical tools for Vibrio detection and quantification in aquatic ecosystems. In a first step, a system based on a « sandwich » hybridization format, in which nucleic acid targets were bound between an immobilized capture probe and a labeled signal probe, coupled with an optical detection method, was developed. After experimental condition optimization, the test showed high sensitivity with a limit of detection of 5 ng.µL-1 of nucleic acids and was highly specific to Vibrio spp. The method was then successfully applied to Vibrio detection in environmental samples collected in Salses-Leucate lagoon. A second hybridization format, based on a competition between the targeted nucleic acids and the capture probe for the signal probe has been considered using both optical and electrochemical transductions. Concurrently with the development of genosensors, quantitative real-time PCR have been designed as reference methods. Les épisodes de mortalité massive de l’huître creuse Crassostreae gigas observés sur les côtes françaises depuis 2008 ont été associés à certaines espèces appartenant au genre bactérien Vibrio. Ces mortalités, particulièrement intenses et rapides au cœur des lagunes méditerranéennes, atteignent 80 à 100% de la production ostréicole remettant ainsi en cause la pérennité de cette activité. Une surveillance environnementale de ces ... Doctoral or Postdoctoral Thesis Pacific oyster HAL Sorbonne Université |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
French |
topic |
Environmental monitoring Aquatic ecosystems Vibrio spp Genosensors Quantitative real-time PCR Surveillance environnementale Écosystèmes aquatiques Génocapteurs PCR quantitative en temps réel [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
Environmental monitoring Aquatic ecosystems Vibrio spp Genosensors Quantitative real-time PCR Surveillance environnementale Écosystèmes aquatiques Génocapteurs PCR quantitative en temps réel [SDV.EE]Life Sciences [q-bio]/Ecology environment Silva, Elise Da Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments |
topic_facet |
Environmental monitoring Aquatic ecosystems Vibrio spp Genosensors Quantitative real-time PCR Surveillance environnementale Écosystèmes aquatiques Génocapteurs PCR quantitative en temps réel [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
Mass mortality events affecting the Pacific oyster Crassostreae gigas on French coasts since 2008 have been associated to some Vibrio species. These mortalities, particularly severe and sudden in the mediterranean lagoons, can reach 80 to 100% of the oyster production threatening the sustainability of this activity. An environmental monitoring of these bacteria appears essential and, for this purpose, innovative analytical methods have to be developed as alternative to classical techniques, in order to allow the rapid and in real time monitoring of Vibrio in the coastal aquatic environments. In this context, the objective of the thesis was to design genosensors as analytical tools for Vibrio detection and quantification in aquatic ecosystems. In a first step, a system based on a « sandwich » hybridization format, in which nucleic acid targets were bound between an immobilized capture probe and a labeled signal probe, coupled with an optical detection method, was developed. After experimental condition optimization, the test showed high sensitivity with a limit of detection of 5 ng.µL-1 of nucleic acids and was highly specific to Vibrio spp. The method was then successfully applied to Vibrio detection in environmental samples collected in Salses-Leucate lagoon. A second hybridization format, based on a competition between the targeted nucleic acids and the capture probe for the signal probe has been considered using both optical and electrochemical transductions. Concurrently with the development of genosensors, quantitative real-time PCR have been designed as reference methods. Les épisodes de mortalité massive de l’huître creuse Crassostreae gigas observés sur les côtes françaises depuis 2008 ont été associés à certaines espèces appartenant au genre bactérien Vibrio. Ces mortalités, particulièrement intenses et rapides au cœur des lagunes méditerranéennes, atteignent 80 à 100% de la production ostréicole remettant ainsi en cause la pérennité de cette activité. Une surveillance environnementale de ces ... |
author2 |
Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM) PIERRE FABRE-EDF (EDF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Perpignan Lise Barthelmebs Julia Baudart-Lenfant |
format |
Doctoral or Postdoctoral Thesis |
author |
Silva, Elise Da |
author_facet |
Silva, Elise Da |
author_sort |
Silva, Elise Da |
title |
Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments |
title_short |
Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments |
title_full |
Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments |
title_fullStr |
Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments |
title_full_unstemmed |
Development of innovative analytical tools for the monitoring of Vibrio populations in aquatic environments |
title_sort |
development of innovative analytical tools for the monitoring of vibrio populations in aquatic environments |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://theses.hal.science/tel-02316309 https://theses.hal.science/tel-02316309/document https://theses.hal.science/tel-02316309/file/These_DaSilva_Elise_2017corr.pdf |
genre |
Pacific oyster |
genre_facet |
Pacific oyster |
op_source |
https://theses.hal.science/tel-02316309 Ecologie, Environnement. Université de Perpignan, 2017. Français. ⟨NNT : 2017PERP0057⟩ |
op_relation |
NNT: 2017PERP0057 tel-02316309 https://theses.hal.science/tel-02316309 https://theses.hal.science/tel-02316309/document https://theses.hal.science/tel-02316309/file/These_DaSilva_Elise_2017corr.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1810470505091694592 |