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Oyanedel D, Lagorce A, Bruto M, Haffner P, Morot A, Labreuche Y, Dorant Y, de La Forest Divonne S, Delavat F, Inguimbert N, Montagnani C, Morga B, Toulza E, Chaparro C, Escoubas JM, Gueguen Y, Vidal-Dupiol J, de Lorgeril J, Petton B, Degremont L, Tourbiez D, Pimparé LL, Leroy M, Romatif O, Pouzadoux J, Mitta G, Le Roux F, Charrière GM, Travers MA, Destoumieux-Garzón D. Cooperation and cheating orchestrate Vibrio assemblages and polymicrobial synergy in oysters infected with OsHV-1 virus. Proc Natl Acad Sci U S A 2023; 120:e2305195120. [PMID: 37751557 PMCID: PMC10556616 DOI: 10.1073/pnas.2305195120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 08/10/2023] [Indexed: 09/28/2023] Open
Abstract
Polymicrobial infections threaten the health of humans and animals but remain understudied in natural systems. We recently described the Pacific Oyster Mortality Syndrome (POMS), a polymicrobial disease affecting oyster production worldwide. In the French Atlantic coast, the disease involves coinfection with ostreid herpesvirus 1 (OsHV-1) and virulent Vibrio. However, it is unknown whether consistent Vibrio populations are associated with POMS in different regions, how Vibrio contribute to POMS, and how they interact with OsHV-1 during pathogenesis. By connecting field-based approaches in a Mediterranean ecosystem, laboratory infection assays and functional genomics, we uncovered a web of interdependencies that shape the structure and function of the POMS pathobiota. We show that Vibrio harveyi and Vibrio rotiferianus are predominant in OsHV-1-diseased oysters and that OsHV-1 drives the partition of the Vibrio community observed in the field. However only V. harveyi synergizes with OsHV-1 by promoting mutual growth and accelerating oyster death. V. harveyi shows high-virulence potential and dampens oyster cellular defenses through a type 3 secretion system, making oysters a more favorable niche for microbe colonization. In addition, V. harveyi produces a key siderophore called vibrioferrin. This important resource promotes the growth of V. rotiferianus, which cooccurs with V. harveyi in diseased oysters, and behaves as a cheater by benefiting from V. harveyi metabolite sharing. Our data show that cooperative behaviors contribute to synergy between bacterial and viral coinfecting partners. Additional cheating behaviors further shape the polymicrobial consortium. Controlling cooperative behaviors or countering their effects opens avenues for mitigating polymicrobial diseases.
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Affiliation(s)
- Daniel Oyanedel
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Arnaud Lagorce
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Maxime Bruto
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, PlouzanéF-29280, France
- Sorbonne Université, Université Pierre et Marie Curie Paris 06, CNRS, UMR8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, RoscoffF-29680, France
| | - Philippe Haffner
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Amandine Morot
- Université de Bretagne Occidentale, CNRS, Institut de recherche pour le développement (IRD), Ifremer, Laboratoire des sciences de l'environnement marin (LEMAR), Plouzané,F-29280, France
- Laboratoire de Biotechnologie et Chimie Marines, Université Bretagne Sud, EMR CNRS 6076, Institut Universitaire Européen de la Mer, LorientF-56100, France
| | - Yannick Labreuche
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, PlouzanéF-29280, France
- Sorbonne Université, Université Pierre et Marie Curie Paris 06, CNRS, UMR8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, RoscoffF-29680, France
| | - Yann Dorant
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Sébastien de La Forest Divonne
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - François Delavat
- Nantes Université, CNRS, Unité en Sciences Biologiques et Biotechnologies (US2B), UMR6286, Nantes,F-44000, France
| | - Nicolas Inguimbert
- Centre de Recherches Insulaires et OBservatoire de l’Environnement (CRIOBE), UAR3278, Ecole Pratique des Hautes Etudes (EPHE), Université de Perpignan Via Domitia, CNRS, PerpignanF-66860, France
| | - Caroline Montagnani
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Benjamin Morga
- Ifremer, Adaptation Santé des invertébrés Marins (ASIM), La TrembladeF-17390, France
| | - Eve Toulza
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Cristian Chaparro
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Jean-Michel Escoubas
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Yannick Gueguen
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
- MARine Biodiversity, Exploitation and Conservation (MARBEC) Univ Montpellier, CNRS, Ifremer, IRD, SèteF-34200, France
| | - Jeremie Vidal-Dupiol
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Julien de Lorgeril
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, ENTROPIE, Nouméa, Nouvelle-Calédonie,F-98800, France
| | - Bruno Petton
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, PlouzanéF-29280, France
- Université de Bretagne Occidentale, CNRS, Institut de recherche pour le développement (IRD), Ifremer, Laboratoire des sciences de l'environnement marin (LEMAR), Plouzané,F-29280, France
| | - Lionel Degremont
- Ifremer, Adaptation Santé des invertébrés Marins (ASIM), La TrembladeF-17390, France
| | - Delphine Tourbiez
- Ifremer, Adaptation Santé des invertébrés Marins (ASIM), La TrembladeF-17390, France
| | - Léa-Lou Pimparé
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Marc Leroy
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Océane Romatif
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Juliette Pouzadoux
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Guillaume Mitta
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
- Ifremer, Université de Polynésie Française, IRD, Institut Louis Malardé (ILM), Ecosystèmes Insulaires Océaniens (EIO), VairaoF-98719, Polynésie Française
| | - Frédérique Le Roux
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de la Pointe du Diable, PlouzanéF-29280, France
- Sorbonne Université, Université Pierre et Marie Curie Paris 06, CNRS, UMR8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, RoscoffF-29680, France
| | - Guillaume M. Charrière
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Marie-Agnès Travers
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
| | - Delphine Destoumieux-Garzón
- Interactions Hôtes Pathogènes Environnements (IHPE), Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, MontpellierF-34090, France
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Richard JC, Blevins E, Dunn CD, Leis EM, Goldberg TL. Viruses of Freshwater Mussels during Mass Mortality Events in Oregon and Washington, USA. Viruses 2023; 15:1719. [PMID: 37632061 PMCID: PMC10458741 DOI: 10.3390/v15081719] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/04/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
Freshwater mussels (Unionida) are globally imperiled, in part due to largely unexplained mass mortality events (MMEs). While recent studies have begun to investigate the possibility that mussel MMEs in the Eastern USA may be caused by infectious diseases, mussels in the Western USA have received relatively little attention in this regard. We conducted a two-year epidemiologic investigation of the role of viruses in ongoing MMEs of the Western pearlshell (Margaritifera falcata) and the Western ridged mussel (Gonidea angulata) in the Chehalis River and Columbia River watersheds in the Western USA. We characterized viromes of mussel hemolymph from 5 locations in 2018 and 2020 using metagenomic methods and identified 557 viruses based on assembled contiguous sequences, most of which are novel. We also characterized the distribution and diversity of a previously identified mussel Gammarhabdovirus related to pathogenic finfish viruses. Overall, we found few consistent associations between viruses and mussel health status. Variation in mussel viromes was most strongly driven by location, with little influence from date, species, or health status, though these variables together only explained ~1/3 of variation in virome composition. Our results demonstrate that Western freshwater mussels host remarkably diverse viromes, but no single virus or combination of viruses appears to be associated with morbidity or mortality during MMEs. Our findings have implications for the conservation of imperiled freshwater mussels, including efforts to enhance natural populations through captive propagation.
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Affiliation(s)
- Jordan C. Richard
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53706, USA;
- Southwestern Virginia Field Office, U.S. Fish and Wildlife Service, Abingdon, VA 24210, USA
| | - Emilie Blevins
- Xerces Society for Invertebrate Conservation, Portland, OR 97232, USA;
| | - Christopher D. Dunn
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Eric M. Leis
- La Crosse Fish Health Center, Midwest Fisheries Center, U.S. Fish and Wildlife Service, Onalaska, WI 54650, USA;
| | - Tony L. Goldberg
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53706, USA;
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Lemonnier C, Chalopin M, Huvet A, Le Roux F, Labreuche Y, Petton B, Maignien L, Paul-Pont I, Reveillaud J. Time-series incubations in a coastal environment illuminates the importance of early colonizers and the complexity of bacterial biofilm dynamics on marine plastics. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 312:119994. [PMID: 36028078 DOI: 10.1016/j.envpol.2022.119994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/26/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
The problematic of microplastics pollution in the marine environment is tightly linked to their colonization by a wide diversity of microorganisms, the so-called plastisphere. The composition of the plastisphere relies on a complex combination of multiple factors including the surrounding environment, the time of incubation along with the polymer type, making it difficult to understand how the biofilm evolves during the microplastic lifetime over the oceans. To better define bacterial community assembly processes on plastics, we performed a 5 months spatio-temporal survey of the plastisphere in an oyster farming area in the Bay of Brest (France). We deployed three types of plastic pellets in two positions in the foreshore and in the water column. Plastic-associated biofilm composition in all these conditions was monitored using 16 S rRNA metabarcoding and compared to free-living and attached bacterial members of seawater. We observed that bacterial families associated to plastic pellets were significantly distinct from the ones found in seawater, with a significant prevalence of filamentous Cyanobacteria on plastics. No convergence towards a unique plastisphere was detected between polymers exposed in the intertidal and subtidal area, emphasizing the central role of the surrounding environment on constantly shaping the plastisphere community diversity. However, we could define a bulk of early-colonizers of marine biofilms such as Alteromonas, Pseudoalteromonas or Vibrio. These early-colonizers could reach high abundances in floating microplastics collected in field-sampling studies, suggesting the plastic-associated biofilms could remain at early development stages across large oceanic scales. Our study raises the hypothesis that most members of the plastisphere, including putative pathogens, could result of opportunistic colonization processes and unlikely long-term transport.
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Affiliation(s)
- C Lemonnier
- Univ Brest (UBO), CNRS, IFREMER, Laboratoire de Microbiologie des Environnements Extrêmes, F-29280, Plouzané, France.
| | - M Chalopin
- Univ Brest (UBO), CNRS, IFREMER, IRD, LEMAR, F-29280, Plouzané, France
| | - A Huvet
- Univ Brest (UBO), CNRS, IFREMER, IRD, LEMAR, F-29280, Plouzané, France
| | - F Le Roux
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de La Pointe Du Diable, CS 10070, F-29280, Plouzané, France
| | - Y Labreuche
- Ifremer, Unité Physiologie Fonctionnelle des Organismes Marins, ZI de La Pointe Du Diable, CS 10070, F-29280, Plouzané, France; Sorbonne Universités, UPMC Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
| | - B Petton
- Univ Brest (UBO), CNRS, IFREMER, IRD, LEMAR, F-29280, Plouzané, France
| | - L Maignien
- Univ Brest (UBO), CNRS, IFREMER, Laboratoire de Microbiologie des Environnements Extrêmes, F-29280, Plouzané, France
| | - I Paul-Pont
- Univ Brest (UBO), CNRS, IFREMER, IRD, LEMAR, F-29280, Plouzané, France
| | - J Reveillaud
- MIVEGEC, University of Montpellier, INRAe, CNRS, IRD, Montpellier, France
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Fallet M, Montagnani C, Petton B, Dantan L, de Lorgeril J, Comarmond S, Chaparro C, Toulza E, Boitard S, Escoubas JM, Vergnes A, Le Grand J, Bulla I, Gueguen Y, Vidal-Dupiol J, Grunau C, Mitta G, Cosseau C. Early life microbial exposures shape the Crassostrea gigas immune system for lifelong and intergenerational disease protection. MICROBIOME 2022; 10:85. [PMID: 35659369 PMCID: PMC9167547 DOI: 10.1186/s40168-022-01280-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/14/2022] [Indexed: 05/21/2023]
Abstract
BACKGROUND The interaction of organisms with their surrounding microbial communities influences many biological processes, a notable example of which is the shaping of the immune system in early life. In the Pacific oyster, Crassostrea gigas, the role of the environmental microbial community on immune system maturation - and, importantly, protection from infectious disease - is still an open question. RESULTS Here, we demonstrate that early life microbial exposure durably improves oyster survival when challenged with the pathogen causing Pacific oyster mortality syndrome (POMS), both in the exposed generation and in the subsequent one. Combining microbiota, transcriptomic, genetic, and epigenetic analyses, we show that the microbial exposure induced changes in epigenetic marks and a reprogramming of immune gene expression leading to long-term and intergenerational immune protection against POMS. CONCLUSIONS We anticipate that this protection likely extends to additional pathogens and may prove to be an important new strategy for safeguarding oyster aquaculture efforts from infectious disease. tag the videobyte/videoabstract in this section Video Abstract.
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Affiliation(s)
- Manon Fallet
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Caroline Montagnani
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Bruno Petton
- Ifremer, UBO CNRS IRD, LEMAR UMR 6539, Argenton, France
| | - Luc Dantan
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Julien de Lorgeril
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, ENTROPIE, F-98800, Nouméa, Nouvelle-Calédonie, France
| | - Sébastien Comarmond
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Cristian Chaparro
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Eve Toulza
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Simon Boitard
- CBGP, CIRAD, INRAE, Institut Agro, IRD, Université de Montpellier, Montpellier, France
| | - Jean-Michel Escoubas
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Agnès Vergnes
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | | | - Ingo Bulla
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Yannick Gueguen
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
- MARBEC, CNRS, Ifremer, IRD, Univ Montpellier, Sète, France
| | - Jérémie Vidal-Dupiol
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Christoph Grunau
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France
| | - Guillaume Mitta
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France.
- Ifremer, UMR 241 Écosystèmes Insulaires Océaniens, Labex Corail, Centre Ifremer du Pacifique, BP 49, 98725, Tahiti, French Polynesia.
| | - Céline Cosseau
- IHPE, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan via Domitia, Perpignan, France.
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Co-occurrence of pathogen assemblages in a keystone species the common cockle Cerastoderma edule on the Irish coast. Parasitology 2022; 148:1665-1679. [PMID: 35060462 PMCID: PMC8564771 DOI: 10.1017/s0031182021001396] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Despite coinfections being recognized as the rule in animal populations, most studies focus on single pathogen systems. Pathogen interaction networks and the drivers of such associations are lacking in disease ecology studies. Common cockle Cerastoderma edule populations are exposed to a great diversity of pathogens, thus making them a good model system to investigate. This study examined the diversity and prevalence of pathogens from different taxonomic levels in wild and fished C. edule on the Irish coast. Potential interactions were tested focussing on abiotic (seawater temperature and salinity) and biotic (cockle size and age, and epiflora on shells) factors. No Microsporidia nor OsHV-1μVar were detected. Single infections with Haplosporidia (37.7%) or Vibrio (25.3%) were more common than two-pathogen coinfected individuals (9.5%), which may more easily succumb to infection. Fished C. edule populations with high cockle densities were more exposed to infections. Higher temperature and presence of epiflora on cockle shells promoted coinfection in warmer months. Low seawater salinity, host condition and proximity to other infected host species influenced coinfection distribution. A positive association between two Minchinia spp. was observed, most likely due to their different pathogenic effect. Findings highlight the major influence that ecological factors have on pathogen interactions and host–pathogen interplay.
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Pathirana E, Whittington RJ, Hick PM. Impact of seawater temperature on the Pacific oyster (Crassostrea gigas) microbiome and susceptibility to disease associated with Ostreid herpesvirus-1 (OsHV-1). ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an21505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Fuhrmann M, Georgiades E, Cattell G, Brosnahan C, Lane HS, Hick PM. Aquatic pathogens and biofouling: pilot study of ostreid herpesvirus 1 translocation by bivalves. BIOFOULING 2021; 37:949-963. [PMID: 34628999 DOI: 10.1080/08927014.2021.1985474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 09/16/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Ostreid herpesvirus 1 (OsHV-1) has caused mass mortalities in Pacific oysters (Crassostrea gigas) in Europe, Australia, and New Zealand. While aquaculture-associated movements of infected Pacific oysters are a well-known cause of OsHV-1 spread once established in a region, translocation via biofouling of aquaculture equipment or vessels needs further investigation to explain the more distant spread of OsHV-1. Laboratory experiments were designed to test for transmission of OsHV-1 between infected and naïve Pacific oysters via a simulated biofouling translocation scenario. Three common biofouling species [Sydney rock oysters (Saccostrea glomerata), Mediterranean mussels (Mytilus galloprovincialis) and Pacific oysters] were tested as intermediaries using a cohabitation challenge with Pacific oysters infected by injection. Transmission occurred, albeit for one of eight replicates when Pacific oysters were the intermediary species. This demonstrated a possible pathway for pathogen spread via biofouling containing Pacific oysters while highlighting the complexity of OsHV-1 transmission. Such complexities require further investigation to inform future risk assessments and management of fouled aquaculture equipment and vessels.
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Affiliation(s)
- M Fuhrmann
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, New South Wales, Australia
| | - E Georgiades
- Ministry for Primary Industries, Wellington, New Zealand
| | - G Cattell
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, New South Wales, Australia
| | - C Brosnahan
- Ministry for Primary Industries, Wellington, New Zealand
| | - H S Lane
- Ministry for Primary Industries, Wellington, New Zealand
| | - P M Hick
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, New South Wales, Australia
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8
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Pernet F, Lugué K, Petton B. Competition for food reduces disease susceptibility in a marine invertebrate. Ecosphere 2021. [DOI: 10.1002/ecs2.3435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Fabrice Pernet
- Ifremer CNRS IRD LEMAR University of Brest PlouzaneF‐29280France
| | - Klervi Lugué
- Ifremer CNRS IRD LEMAR University of Brest PlouzaneF‐29280France
| | - Bruno Petton
- Ifremer CNRS IRD LEMAR University of Brest PlouzaneF‐29280France
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9
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Petton B, Destoumieux-Garzón D, Pernet F, Toulza E, de Lorgeril J, Degremont L, Mitta G. The Pacific Oyster Mortality Syndrome, a Polymicrobial and Multifactorial Disease: State of Knowledge and Future Directions. Front Immunol 2021; 12:630343. [PMID: 33679773 PMCID: PMC7930376 DOI: 10.3389/fimmu.2021.630343] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 01/06/2021] [Indexed: 01/22/2023] Open
Abstract
The Pacific oyster (Crassostreae gigas) has been introduced from Asia to numerous countries around the world during the 20th century. C. gigas is the main oyster species farmed worldwide and represents more than 98% of oyster production. The severity of disease outbreaks that affect C. gigas, which primarily impact juvenile oysters, has increased dramatically since 2008. The most prevalent disease, Pacific oyster mortality syndrome (POMS), has become panzootic and represents a threat to the oyster industry. Recently, major steps towards understanding POMS have been achieved through integrative molecular approaches. These studies demonstrated that infection by Ostreid herpesvirus type 1 µVar (OsHV-1 µvar) is the first critical step in the infectious process and leads to an immunocompromised state by altering hemocyte physiology. This is followed by dysbiosis of the microbiota, which leads to a secondary colonization by opportunistic bacterial pathogens, which in turn results in oyster death. Host and environmental factors (e.g. oyster genetics and age, temperature, food availability, and microbiota) have been shown to influence POMS permissiveness. However, we still do not understand the mechanisms by which these different factors control disease expression. The present review discusses current knowledge of this polymicrobial and multifactorial disease process and explores the research avenues that must be investigated to fully elucidate the complexity of POMS. These discoveries will help in decision-making and will facilitate the development of tools and applied innovations for the sustainable and integrated management of oyster aquaculture.
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Affiliation(s)
- Bruno Petton
- Ifremer, LEMAR UMR 6539, UBO/CNRS/IRD/Ifremer, Argenton-en-Landunvez, France
| | | | - Fabrice Pernet
- Ifremer, LEMAR UMR 6539, UBO/CNRS/IRD/Ifremer, Argenton-en-Landunvez, France
| | - Eve Toulza
- IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, Montpellier, France
| | - Julien de Lorgeril
- IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, Montpellier, France
| | | | - Guillaume Mitta
- IHPE, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, Montpellier, France
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10
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Fleury E, Barbier P, Petton B, Normand J, Thomas Y, Pouvreau S, Daigle G, Pernet F. Latitudinal drivers of oyster mortality: deciphering host, pathogen and environmental risk factors. Sci Rep 2020; 10:7264. [PMID: 32350335 PMCID: PMC7190702 DOI: 10.1038/s41598-020-64086-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 04/04/2020] [Indexed: 11/25/2022] Open
Abstract
Diseases pose an ongoing threat to aquaculture, fisheries and conservation of marine species, and determination of risk factors of disease is crucial for management. Our objective was to decipher the effects of host, pathogen and environmental factors on disease-induced mortality of Pacific oysters (Crassostrea gigas) across a latitudinal gradient. We deployed young and adult oysters at 13 sites in France and we monitored survival, pathogens and environmental parameters. The young oysters came from either the wild collection or the hatchery while the adults were from the wild only. We then used Cox regression models to investigate the effect of latitude, site, environmental factors and origin on mortality risk and to extrapolate this mortality risk to the distribution limits of the species in Europe. We found that seawater temperature, food level, sea level atmospheric pressure, rainfall and wind speed were associated with mortality risk. Their effect on hatchery oysters was generally higher than on wild animals, probably reflecting that hatchery oysters were free of Ostreid herpesvirus 1 (OsHV-1) whereas those from the wild were asymptomatic carriers. The risk factors involved in young and adult oyster mortalities were different, reflecting distinct diseases. Mortality risk increases from 0 to 90% with decreasing latitude for young hatchery oysters, but not for young wild oysters or adults. Mortality risk was higher in wild oysters than in hatchery ones at latitude > 47.6°N while this was the opposite at lower latitude. Therefore, latitudinal gradient alters disease-induced mortality risk but interacts with the initial health status of the host and the pathogen involved. Practically, we suggest that mortality can be mitigated by using hatchery oysters in north and wild collected oysters in the south.
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Affiliation(s)
- Elodie Fleury
- Univ Brest, Ifremer, CNRS, IRD, LEMAR, F-29280, Plouzane, France.
| | - Pierrick Barbier
- Univ Brest, Ifremer, CNRS, IRD, LEMAR, F-29280, Plouzane, France
| | - Bruno Petton
- Univ Brest, Ifremer, CNRS, IRD, LEMAR, F-29280, Plouzane, France
| | - Julien Normand
- Ifremer, Laboratoire Environnement Ressources de Normandie, 14520, Port en Bessin, France
| | - Yoann Thomas
- Univ Brest, Ifremer, CNRS, IRD, LEMAR, F-29280, Plouzane, France
| | | | - Gaétan Daigle
- Département de Mathématiques et Statistique, Université Laval, Sainte-Foy, Québec, G1K 7P4, Canada
| | - Fabrice Pernet
- Univ Brest, Ifremer, CNRS, IRD, LEMAR, F-29280, Plouzane, France
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11
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Pernet F, Tamayo D, Fuhrmann M, Petton B. Deciphering the effect of food availability, growth and host condition on disease susceptibility in a marine invertebrate. ACTA ACUST UNITED AC 2019; 222:jeb.210534. [PMID: 31439650 DOI: 10.1242/jeb.210534] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 08/19/2019] [Indexed: 01/26/2023]
Abstract
Food provisioning influences disease risk and outcome in animal populations in two ways. On the one hand, unrestricted food supply improves the physiological condition of the host and lowers its susceptibility to infectious disease, reflecting a trade-off between immunity and other fitness-related functions. On the other hand, food scarcity limits the resources available to the pathogen and slows the growth and metabolism of the host on which the pathogen depends to proliferate. Here, we investigated how food availability, growth rate and energetic reserves drive the outcome of a viral disease affecting an ecologically relevant model host, the Pacific oyster, Crassostrea gigas We selected fast- and slow-growing animals, and we exposed them to high and low food rations. We evaluated their energetic reserves, challenged them with a pathogenic virus, monitored daily survival and developed a mortality risk model. Although high food levels and oyster growth were associated with a higher risk of mortality, energy reserves were associated with a lower risk. Food availability acts both as an enabling factor for mortality by increasing oyster growth and as a limiting factor by increasing their energy reserves. This study clarifies how food resources have an impact on susceptibility to disease and indicates how the host's physiological condition could mitigate epidemics. Practically, we suggest that growth should be optimized rather than maximized, considering that trade-offs occur with disease resistance or tolerance.
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Affiliation(s)
- Fabrice Pernet
- Ifremer, UMR LEMAR 6539 (CNRS/UBO/Ifremer/IRD), Technopôle de Brest-Iroise, 29280 Plouzané, France
| | - David Tamayo
- Ifremer, UMR LEMAR 6539 (CNRS/UBO/Ifremer/IRD), Technopôle de Brest-Iroise, 29280 Plouzané, France.,Departamento GAFFA (Animal Physiology), Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apartado 644, 48080 Bilbao, Spain
| | - Marine Fuhrmann
- Ifremer, UMR LEMAR 6539 (CNRS/UBO/Ifremer/IRD), Technopôle de Brest-Iroise, 29280 Plouzané, France.,School of Veterinary Science, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570, Australia
| | - Bruno Petton
- Ifremer, UMR LEMAR 6539 (CNRS/UBO/Ifremer/IRD), Technopôle de Brest-Iroise, 29280 Plouzané, France
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