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First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast

Blooms of the benthic toxic dinoflagellate genus Ostreopsis have been recorded more frequently during the last two decades, particularly in warm temperate areas such as the Mediterranean Sea. The proliferation of Ostreopsis species may cause deleterious effects on ecosystems and can impact human hea...

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Autores principales: Chomérat, Nicolas, Antajan, Elvire, Auby, Isabelle, Bilien, Gwenael, Carpentier, Liliane, de Casamajor, Marie-Noëlle, Ganthy, Florian, Hervé, Fabienne, Labadie, Magali, Méteigner, Claire, Paradis, Camille, Perrière-Rumèbe, Myriam, Sanchez, Florence, Séchet, Véronique, Amzil, Zouher
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9315632/
https://www.ncbi.nlm.nih.gov/pubmed/35877754
http://dx.doi.org/10.3390/md20070461
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author Chomérat, Nicolas
Antajan, Elvire
Auby, Isabelle
Bilien, Gwenael
Carpentier, Liliane
de Casamajor, Marie-Noëlle
Ganthy, Florian
Hervé, Fabienne
Labadie, Magali
Méteigner, Claire
Paradis, Camille
Perrière-Rumèbe, Myriam
Sanchez, Florence
Séchet, Véronique
Amzil, Zouher
author_facet Chomérat, Nicolas
Antajan, Elvire
Auby, Isabelle
Bilien, Gwenael
Carpentier, Liliane
de Casamajor, Marie-Noëlle
Ganthy, Florian
Hervé, Fabienne
Labadie, Magali
Méteigner, Claire
Paradis, Camille
Perrière-Rumèbe, Myriam
Sanchez, Florence
Séchet, Véronique
Amzil, Zouher
author_sort Chomérat, Nicolas
collection PubMed
description Blooms of the benthic toxic dinoflagellate genus Ostreopsis have been recorded more frequently during the last two decades, particularly in warm temperate areas such as the Mediterranean Sea. The proliferation of Ostreopsis species may cause deleterious effects on ecosystems and can impact human health through skin contact or aerosol inhalation. In the eastern Atlantic Ocean, the toxic O. cf. ovata has not yet been reported to the north of Portugal, and the only species present further north was O. cf. siamensis, for which the toxic risk is considered low. During summer blooms of unidentified Ostreopsis species on the French Basque coast (Atlantic) in 2020 and 2021, people suffered from irritations and respiratory disorders, and the number of analyzed cases reached 674 in 2021. In order to investigate the causes, sampling was carried out during summer 2021 to (i) taxonomically identify Ostreopsis species present using a molecular approach, (ii) isolate strains from the bloom and culture them, and (iii) characterize the presence of known toxins which may be involved. For the first time, this study reports the presence of both O. cf. siamensis and O. cf. ovata, for which the French Basque coast is a new upper distribution limit. Furthermore, the presence of ovatoxins a, b, c, and d in the environmental sample and in a cultivated strain in culture confirmed the toxic nature of the bloom and allowed identifying O. cf. ovata as the producer. The present data identify a new health risk in the area and highlight the extended distribution of some harmful dinoflagellates, presumably in relation to climate change.
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spelling pubmed-93156322022-07-27 First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast Chomérat, Nicolas Antajan, Elvire Auby, Isabelle Bilien, Gwenael Carpentier, Liliane de Casamajor, Marie-Noëlle Ganthy, Florian Hervé, Fabienne Labadie, Magali Méteigner, Claire Paradis, Camille Perrière-Rumèbe, Myriam Sanchez, Florence Séchet, Véronique Amzil, Zouher Mar Drugs Article Blooms of the benthic toxic dinoflagellate genus Ostreopsis have been recorded more frequently during the last two decades, particularly in warm temperate areas such as the Mediterranean Sea. The proliferation of Ostreopsis species may cause deleterious effects on ecosystems and can impact human health through skin contact or aerosol inhalation. In the eastern Atlantic Ocean, the toxic O. cf. ovata has not yet been reported to the north of Portugal, and the only species present further north was O. cf. siamensis, for which the toxic risk is considered low. During summer blooms of unidentified Ostreopsis species on the French Basque coast (Atlantic) in 2020 and 2021, people suffered from irritations and respiratory disorders, and the number of analyzed cases reached 674 in 2021. In order to investigate the causes, sampling was carried out during summer 2021 to (i) taxonomically identify Ostreopsis species present using a molecular approach, (ii) isolate strains from the bloom and culture them, and (iii) characterize the presence of known toxins which may be involved. For the first time, this study reports the presence of both O. cf. siamensis and O. cf. ovata, for which the French Basque coast is a new upper distribution limit. Furthermore, the presence of ovatoxins a, b, c, and d in the environmental sample and in a cultivated strain in culture confirmed the toxic nature of the bloom and allowed identifying O. cf. ovata as the producer. The present data identify a new health risk in the area and highlight the extended distribution of some harmful dinoflagellates, presumably in relation to climate change. MDPI 2022-07-18 /pmc/articles/PMC9315632/ /pubmed/35877754 http://dx.doi.org/10.3390/md20070461 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chomérat, Nicolas
Antajan, Elvire
Auby, Isabelle
Bilien, Gwenael
Carpentier, Liliane
de Casamajor, Marie-Noëlle
Ganthy, Florian
Hervé, Fabienne
Labadie, Magali
Méteigner, Claire
Paradis, Camille
Perrière-Rumèbe, Myriam
Sanchez, Florence
Séchet, Véronique
Amzil, Zouher
First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast
title First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast
title_full First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast
title_fullStr First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast
title_full_unstemmed First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast
title_short First Characterization of Ostreopsis cf. ovata (Dinophyceae) and Detection of Ovatoxins during a Multispecific and Toxic Ostreopsis Bloom on French Atlantic Coast
title_sort first characterization of ostreopsis cf. ovata (dinophyceae) and detection of ovatoxins during a multispecific and toxic ostreopsis bloom on french atlantic coast
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9315632/
https://www.ncbi.nlm.nih.gov/pubmed/35877754
http://dx.doi.org/10.3390/md20070461
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