Oysters under threat from deadly herpes virus that is spreading around the world

THE world could soon be facing an oyster shortage as a deadly herpes virus is threatening to devastate oyster populations. The virus known as Ostreid herpesvirus 1 (OsHV-1), is impacting Pacific oysters, which is the most popular species to eat due to their large size and experts are worried it could continue to spread around … Continue reading Oysters under threat from deadly herpes virus that is spreading around the world

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Oysters can get herpes, and it’s killing them. A deadly virus threatens to decimate oyster populations around the world

Oysters, a delicacy eaten on most coastlines of the world, are a multi-billion-dollar industry. They also are intriguing to study from a health perspective. Oysters feed by filtering tiny plankton from the surrounding water, processing up to 50 gallons per oyster daily. In doing so, they improve water quality and make their ecosystems healthier. But the water … Continue reading Oysters can get herpes, and it’s killing them. A deadly virus threatens to decimate oyster populations around the world

Long dsRNAs promote an anti-viral response in Pacific oyster hampering ostreid herpesvirus 1 replication

Double stranded RNA-mediated genetic interference (RNAi) is a widely used reverse genetic tool for determining the loss-of-function phenotype of a gene. Here, the possible induction of an immune response by long dsRNA was tested in a marine bivalve, i.e. Crassostrea gigas, as well as the specific role of the subunit 2 of the nuclear factor … Continue reading Long dsRNAs promote an anti-viral response in Pacific oyster hampering ostreid herpesvirus 1 replication

Oyster RNA-seq data support the development of Malacoherpesviridae genomics

The family of double-stranded DNA (dsDNA) Malacoherpesviridae includes viruses able to infect marine mollusks and detrimental for worldwide aquaculture production. Due to fast-occurring mortality and a lack of permissive cell lines, the available data on the few known Malacoherpesviridae provide only partial support for the study of molecular virus features, life cycle, and evolutionary history. … Continue reading Oyster RNA-seq data support the development of Malacoherpesviridae genomics

The COMPLEXity in herpesvirus entry

Enveloped viruses have evolved diverse transmembrane proteins and protein complexes to enable host cell entry by regulating and activating membrane fusion in a target cell-specific manner. In general terms, the entry process requires a receptor binding step, an activation step and a membrane fusion step, which can be encoded within a single viral protein or … Continue reading The COMPLEXity in herpesvirus entry

Transmission of Ostreid herpesvirus-1 microvariant in seawater: Detection of viral DNA in seawater, filter retentates, filter membranes and sentinel Crassostrea gigas spat in upwellers

To understand the transmission of Ostreid herpesvirus-1 microvariant(s) (OsHV-1) in seawater, it is necessary to understand the temporal pattern of occurrence of the virus in seawater in relation to demonstrated infection events in oysters. The aims of the current study were: (1) to investigate the temporal sequence of detection of OsHV-1 in seawater and Crassostrea … Continue reading Transmission of Ostreid herpesvirus-1 microvariant in seawater: Detection of viral DNA in seawater, filter retentates, filter membranes and sentinel Crassostrea gigas spat in upwellers

Detection and distribution of ostreid herpesvirus 1 in experimentally infected Pacific oyster spat

High mortality rates are reported in spat and larvae of Pacific oyster Crassostrea gigas and associated with ostreid herpesvirus 1 (OsHV-1) detection in France. Although the viral infection has been experimentally reproduced in oyster larvae and spat, little knowledge is currently available concerning the viral entry and its distribution in organs and tissues. This study … Continue reading Detection and distribution of ostreid herpesvirus 1 in experimentally infected Pacific oyster spat