Influence of temperature on the pathogenicity of Ostreid herpesvirus-1 in ark clam, Scapharca broughtonii

OsHV-1 is an epidemic pathogen of molluscs, and temperature has been recognized as a decisive environmental factor in its pathogenicity. In recent years, ark clam, Scapharca broughtonii, emerged as a host for OsHV-1. In the north of China, massive summer mortalities of ark clams infected with OsHV-1 have been continuously reported since 2012. However, the … Continue reading Influence of temperature on the pathogenicity of Ostreid herpesvirus-1 in ark clam, Scapharca broughtonii

Pacific oyster, Crassostrea gigas mortality associated with the herpesvirus: etiology and environmental emerging factors (Chapter)

Emerging diseases pose a recurrent threat to bivalve aquaculture. Recently, a number of bivalve species worldwide, including the Pacific oyster, Crassostrea gigas, have been affected by mass mortality events associated with herpesviruses, resulting in significant losses.Massive mortality events in the Pacific oyster C. gigas were associated with the detection of an herpesvirus classified as Ostreid … Continue reading Pacific oyster, Crassostrea gigas mortality associated with the herpesvirus: etiology and environmental emerging factors (Chapter)

High mortality of mussels in northern Brittany – Evaluation of the involvement of pathogens, pathological conditions and pollutants

In 2014, a high and unusual mass mortality of mussels occurred in several important production areas along the French coasts of the Atlantic and English Channel. In the first quarter of 2016, mass mortalities hit farms on the west coast of the country once again. These heterogeneous mortality events elicited a multi-parametric study conducted during … Continue reading High mortality of mussels in northern Brittany – Evaluation of the involvement of pathogens, pathological conditions and pollutants

Detection of isothermally amplified ostreid herpesvirus 1 DNA in Pacific oyster (Crassostrea gigas) using a miniaturised electrochemical biosensor

Highlights • The first electrochemical biosensor to detect OsHV-1 DNA in Crasosstrea gigas is described. • The strategy is based on isothermal recombinase polymerase amplification. • The system achieves a limit of detection of 207 OsHV-1 target copies. • A good correlation with qPCR in the analysis of OsHV-1 DNA in 16 oyster samples is … Continue reading Detection of isothermally amplified ostreid herpesvirus 1 DNA in Pacific oyster (Crassostrea gigas) using a miniaturised electrochemical biosensor

Susceptibility of two abalone species, Haliotis diversicolor supertexta and Haliotis discus hannai, to Haliotid herpesvirus 1 infection

Highlights • Haliotis diversicolor supertexta was highly susceptible to Haliotid herpesvirus 1 (HaHV-1-CN2003). • Haliotis discus hannai was not susceptible to HaHV-1-CN2003. • Tropism of HaHV-1-CN2003 included both neural tissue and haemocytes. Source : Susceptibility of two abalone species, Haliotis diversicolor supertexta and Haliotis discus hannai, to Haliotid herpesvirus 1 infection - ScienceDirect

Rapid transmission of Bonamia exitiosa by cohabitation causes mortality in Ostrea angasi

The haplosporidian Bonamia was first detected in Australian shellfish in 1991. Australian isolates in Ostrea angasi Sowerby, 1871 were identified as Bonamia exitiosa Hine, Cochennac and Berthe, 2001, which threatens development of an O. angasi aquaculture industry. European field data suggest that Bonamia ostreae Pichot, Comps, Tigé, Grizel and Rabouin, 1980 infections in Ostrea edulis … Continue reading Rapid transmission of Bonamia exitiosa by cohabitation causes mortality in Ostrea angasi

RNA-seq of HaHV-1-infected abalones reveals a common transcriptional signature of Malacoherpesviruses

Haliotid herpesvirus-1 (HaHV-1) is the viral agent causative of abalone viral ganglioneuritis, a disease that has severely affected gastropod aquaculture. Although limited, the sequence similarity between HaHV-1 and Ostreid herpesvirus-1 supported the assignment of both viruses to Malacoherpesviridae, a Herpesvirales family distantly related with other viruses. In this study, we reported the first transcriptional data … Continue reading RNA-seq of HaHV-1-infected abalones reveals a common transcriptional signature of Malacoherpesviruses

The role of salinity in physiological responses of bivalves

In recent years, financial losses due to salinity changes threat bivalve industry. In natural habitat, marine bivalves should be adapted to a series of environmental stressors, including biotic (virus, bacteria and protozoan) and abiotic (salinity, temperature and heavy metal) factors. It is known that salinity fluctuations able to change distribution and vital parameters of bivalves. … Continue reading The role of salinity in physiological responses of bivalves

The effect of air exposure, handling stress and imidacloprid on the susceptibility of Crassostrea gigas to ostreid herpesvirus 1 (OsHV-1)

The emergence of the microvariants genotype of ostreid herpesvirus 1 (OsHV-1 µVar) has caused mass mortalities of Pacific oysters Crassostrea gigas, resulting in significant economic losses in Europe, New Zealand and Australia. There is variability in the occurrence and severity of disease caused by OsHV-1, with the disease incompletely described by the known complex interactions … Continue reading The effect of air exposure, handling stress and imidacloprid on the susceptibility of Crassostrea gigas to ostreid herpesvirus 1 (OsHV-1)

Potential of genomic selection for improvement of resistance to Ostreid Herpes virus in Pacific oyster (Crassostrea gigas)

In genomic selection (GS), genome-wide SNP markers are used to generate genomic estimated breeding values (gEBVs) for selection candidates. The application of GS in shellfish looks promising and has the potential to help in dealing with one of the main issues currently affecting Pacific oyster production worldwide, which is the “summer mortality syndrome”. This causes … Continue reading Potential of genomic selection for improvement of resistance to Ostreid Herpes virus in Pacific oyster (Crassostrea gigas)