PMID- 21600247 OWN - NLM STAT- MEDLINE DCOM- 20111216 LR - 20110829 IS - 1872-7492 (Electronic) IS - 0168-1702 (Linking) VI - 160 IP - 1-2 DP - 2011 Sep TI - Detection of different variants of Ostreid Herpesvirus 1 in the Pacific oyster, Crassostrea gigas between 2008 and 2010. PG - 25-31 LID - 10.1016/j.virusres.2011.04.012 [doi] AB - Since summer 2008, high mortality rates of young Pacific oysters Crassostrea gigas have been recorded in association with the detection of the Ostreid Herpesvirus 1 (OsHV-1). A new variant called muVar has been recently described, characterized mainly by 12 consecutive deletions followed by one deletion of an adenine in the C region. The purpose of this study is to characterize the genotype (variants or OsHV-1 reference) of 300 positive samples of C. gigas analyzed between July 2008 and July 2010 collected along the French, Jersey, and Irish coasts. Samples were quantified by TaqMan PCR, amplified with conventional PCR, targeting the area of the deletion, and then sequenced. Eighty-seven percent of the samples were characterized and the OsHV-1 muVar was detected in 257 oyster samples. The genotype OsHV-1 reference was never detected during the 25 months of the present survey. Thirty-eight samples could not be determined and the majority of them had a low viral load. A novel genotype containing only 9 consecutive deletions named OsHV-1 muVar Delta9 was found in 5 samples. These observations indicate the emergence of different OsHV-1 variants. CI - Copyright (c) 2011 Elsevier B.V. All rights reserved. FAU - Martenot, Claire AU - Martenot C AD - Laboratoire Departemental Frank Duncombe, 14053 Caen Cedex 4, France. FAU - Oden, Elise AU - Oden E FAU - Travaille, Emmanuelle AU - Travaille E FAU - Malas, Jean-Paul AU - Malas JP FAU - Houssin, Maryline AU - Houssin M LA - eng PT - Journal Article DEP - 20110510 PL - Netherlands TA - Virus Res JT - Virus research JID - 8410979 RN - 0 (DNA, Viral) SB - IM MH - Animals MH - Atlantic Ocean MH - Crassostrea/*virology MH - DNA, Viral/chemistry/genetics MH - France MH - *Genetic Variation MH - Genotype MH - Herpesviridae/*classification/genetics/*isolation & purification MH - Ireland MH - New Jersey MH - Polymerase Chain Reaction MH - Sequence Analysis, DNA MH - Survival Analysis MH - Viral Load EDAT- 2011/05/24 06:00 MHDA- 2011/12/17 06:00 CRDT- 2011/05/24 06:00 PHST- 2011/02/23 00:00 [received] PHST- 2011/04/15 00:00 [revised] PHST- 2011/04/16 00:00 [accepted] PHST- 2011/05/24 06:00 [entrez] PHST- 2011/05/24 06:00 [pubmed] PHST- 2011/12/17 06:00 [medline] AID - S0168-1702(11)00148-1 [pii] AID - 10.1016/j.virusres.2011.04.012 [doi] PST - ppublish SO - Virus Res. 2011 Sep;160(1-2):25-31. doi: 10.1016/j.virusres.2011.04.012. Epub 2011 May 10.