FN Archimer Export Format PT J TI Fine-scale temporal dynamics of herpes virus and vibrios in seawater during a polymicrobial infection in the Pacific oyster Crassostrea gigas BT AF PETTON, Bruno DE LORGERIL, Julien MITTA, Guillaume Daigle, Gaétan PERNET, Fabrice ALUNNO BRUSCIA, Marianne AS 1:1;2:2;3:4;4:3;5:1;6:1; FF 1:PDG-RBE-PFOM-LPI;2:PDG-RBE-IHPE;3:;4:;5:PDG-RBE-PFOM-LPI;6:PDG-RBE-PFOM-LPI; C1 Ifremer, LEMAR UMR 6539 (Université de Bretagne Occidentale, CNRS, IRD, Ifremer), 11 presqu’île du Vivier, 29840 Argenton-en-Landunvez, France IHPE Interaction Host Pathogen Environment, UMR 5244 (Ifremer, Université de Perpignan Via Domitia, CNRS, Université de Montpellier), CC 80, 34095 Montpellier, France service de Consultation Statistique (SCS), Département de mathématiques et de statistique, Pavillon Adrien-Pouliot, Université Laval, 1065 av. de la Médecine, Québec City, Québec G1V 0A6, Canada IHPE Interaction Host Pathogen Environment, UMR 5244 (Ifremer, Université de Perpignan Via Domitia, CNRS, Université de Montpellier), CC 80, 34095 Montpellier, France C2 IFREMER, FRANCE IFREMER, FRANCE UNIV LAVAL, CANADA UNIV PERPIGNAN, FRANCE SI ARGENTON MONTPELLIER BREST SE PDG-RBE-PFOM-LPI PDG-RBE-IHPE UM LEMAR IHPE IN WOS Ifremer UMR WOS Cotutelle UMR copubli-france copubli-univ-france copubli-int-hors-europe IF 1.368 TC 14 UR https://archimer.ifremer.fr/doc/00507/61870/65940.pdf https://archimer.ifremer.fr/doc/00507/61870/65941.pdf LA English DT Article DE ;Aquaculture;Bivalve;Epidemiology;Health;Polymicrobial disease;OSHV-1;Pacific oyster mortality syndrome;POMS AB The Pacific oyster Crassostrea gigas is currently being impacted by a polymicrobial disease that involves early viral infection by ostreid herpesvirus-1 (OsHV-1) followed by a secondary bacterial infection leading to death. A widely used method of inducing infection consists of placing specific pathogen-free oysters (‘recipients’) in cohabitation in the laboratory with diseased oysters that were naturally infected in the field (‘donors’). With this method, we evaluated the temporal dynamics of pathogen release in seawater and the cohabitation time necessary for disease transmission and expression. We showed that OsHV-1 and Vibrio spp. in the seawater peaked concomitantly during the first 48 h and decreased thereafter. We found that 1.5 h of cohabitation with donors was enough time to transmit pathogens to recipients and to induce mortality later, reflecting the highly contagious nature of the disease. Finally, mortality of recipients was associated with increasing cohabitation time with donors until reaching a plateau at 20%. This reflects the cumulative effect of exposure to pathogens. The optimal cohabitation time was 5−6 d, the mortality of recipients occurring 1−2 d earlier. PY 2019 SO Diseases Of Aquatic Organisms SN 0177-5103 PU Inter-Research VL 135 IS 2 UT 000484007900002 BP 97 EP 106 DI 10.3354/dao03384 ID 61870 ER EF