A novel divergent group of Ostreid herpesvirus 1 μVar variants associated with a mortality event in Pacific oyster spat in Normandy (France) in 2016 - Archive ouverte HAL Access content directly
Journal Articles Journal of Fish Diseases Year : 2018

A novel divergent group of Ostreid herpesvirus 1 μVar variants associated with a mortality event in Pacific oyster spat in Normandy (France) in 2016

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Abstract

The acute course of disease in young oysters infected by OsHV-1 and the rapid tissue degradation often preclude histological examination of specimens collected during outbreaks in field. Herein, live spat originated from two geographical areas were sampled just at the onset of a mortality event that occurred in Normandy (France) in June 2016. The lesions, associated with high OsHV-1 DNA quantities, were characterized by severe and diffuse haemocytosis mainly involving blast-like cells, myocyte degeneration and large, irregularly shaped degenerate eosinophilic cells in the connective tissue. The herpesvirus was identified by negative staining TEM and real-time PCR. Sequencing of the C region and ORFs 42/43 confirmed that the variants met the definition of OsHV-1 μVar. We sequenced 30 other ORFs in twenty OsHV-1-positive individuals and compared them to the μVar specimens isolated between 2009 and 2011. The ORFs encoding putative membrane proteins
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Dates and versions

hal-03400584 , version 1 (25-10-2021)

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Erika A.V. Burioli, Katia Varello, Antonio Lavazza, Elena Bozzetta, Marino Prearo, et al.. A novel divergent group of Ostreid herpesvirus 1 μVar variants associated with a mortality event in Pacific oyster spat in Normandy (France) in 2016. Journal of Fish Diseases, 2018, 41 (11), pp.1759 - 1769. ⟨10.1111/jfd.12883⟩. ⟨hal-03400584⟩
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