PMID- 31342911 OWN - NLM STAT- MEDLINE DCOM- 20190801 LR - 20190801 IS - 0177-5103 (Print) IS - 0177-5103 (Linking) VI - 135 IP - 2 DP - 2019 Jul 25 TI - Fine-scale temporal dynamics of herpes virus and vibrios in seawater during a polymicrobial infection in the Pacific oyster Crassostrea gigas. PG - 97-106 LID - 10.3354/dao03384 [doi] 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. FAU - Petton, Bruno AU - Petton B AD - Ifremer, LEMAR UMR 6539 (Universite de Bretagne Occidentale, CNRS, IRD, Ifremer), 11 presqu'ile du Vivier, 29840 Argenton-en-Landunvez, France. FAU - de Lorgeril, Julien AU - de Lorgeril J FAU - Mitta, Guillaume AU - Mitta G FAU - Daigle, Gaetan AU - Daigle G FAU - Pernet, Fabrice AU - Pernet F FAU - Alunno-Bruscia, Marianne AU - Alunno-Bruscia M LA - eng PT - Journal Article PL - Germany TA - Dis Aquat Organ JT - Diseases of aquatic organisms JID - 8807037 RN - 0 (DNA, Viral) SB - IM MH - Animals MH - Crassostrea MH - DNA, Viral MH - *Herpesviridae MH - Seawater MH - *Vibrio OTO - NOTNLM OT - Aquaculture OT - Bivalve OT - Epidemiology OT - Health OT - OSHV-1 OT - POMS OT - Pacific oyster mortality syndrome OT - Polymicrobial disease EDAT- 2019/07/26 06:00 MHDA- 2019/08/02 06:00 CRDT- 2019/07/26 06:00 PHST- 2019/07/26 06:00 [entrez] PHST- 2019/07/26 06:00 [pubmed] PHST- 2019/08/02 06:00 [medline] AID - 10.3354/dao03384 [doi] PST - ppublish SO - Dis Aquat Organ. 2019 Jul 25;135(2):97-106. doi: 10.3354/dao03384.