Pathogens of marine bivalves in Maine (USA): A historical perspective

Shellfish aquaculture (in particular oyster cultivation) has the potential to play a significant role in refreshing the coastal economy in the state of Maine (USA). Although ocean warming and acidification are often listed as the primary manifestations of climate change in the marine environment, the issue of expanding geographic ranges of parasites and pathogens is … Continue reading Pathogens of marine bivalves in Maine (USA): A historical perspective

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Environmental controls of oyster-pathogenic Vibrio spp. in Oregon estuaries and a shellfish hatchery

Vibrio spp. have been a persistent concern for coastal bivalve hatcheries, which are vulnerable to environmental pathogens in seawater used for rearing larvae, yet the biogeochemical drivers of oyster-pathogenic Vibrio in their planktonic state are poorly understood. Here, we present data tracking oyster-pathogenic Vibrio bacteria in Netarts Bay and Yaquina Bay, Oregon, USA, as well … Continue reading Environmental controls of oyster-pathogenic Vibrio spp. in Oregon estuaries and a shellfish hatchery

Genetic variation in anti-parasite behavior in oysters

Behavioral avoidance of disease-causing parasites provides a first line of defense against the threat of infection. We report that the suspension-feeding oysters Crassostrea virginica respond to the presence of the water-borne parasite Perkinsus marinus by increasing the rate of shell closure and decreasing the clearance of suspended particles from the surrounding seawater. The extent of … Continue reading Genetic variation in anti-parasite behavior in oysters

Seasonal occurrence of Perkinsus spp. and tissue distribution of P. olseni in clam (Soletellina acuta) from coastal waters of Wuchuan County, southern China

Seasonal occurrence of Perkinsus spp. infection in the wild clam, Soletellina acuta, along the coast of Wuchuan County, southern China was investigated over one year using conventional polymerase chain reaction (PCR) method combined with sequencing technique. The tissue distribution of P. olseni in (S. acuta) was also compared among four tissues, namely the gill, mantle, … Continue reading Seasonal occurrence of Perkinsus spp. and tissue distribution of P. olseni in clam (Soletellina acuta) from coastal waters of Wuchuan County, southern China

Temperature modulate disease susceptibility of the Pacific oyster Crassostrea gigas and virulence of the Ostreid herpesvirus type 1

Temperature triggers marine diseases by changing host susceptibility and pathogen virulence. Oyster mortalities associated with the Ostreid herpesvirus type 1 (OsHV-1) have occurred seasonally in Europe when the seawater temperature range reaches 16–24 °C. Here we assess how temperature modulates oyster susceptibility to OsHV-1 and pathogen virulence. Oysters were injected with OsHV-1 suspension incubated at 21 °C, … Continue reading Temperature modulate disease susceptibility of the Pacific oyster Crassostrea gigas and virulence of the Ostreid herpesvirus type 1

Long-term affected flat oyster (Ostrea edulis) haemocytes show differential gene expression profiles from naïve oysters in response to Bonamia ostreae

European flat oyster (Ostrea edulis) production has suffered a severe decline due to bonamiosis. The responsible parasite enters in oyster haemocytes, causing an acute inflammatory response frequently leading to death. We used an immune-enriched oligo-microarray to understand the haemocyte response to Bonamia ostreae by comparing expression profiles between naïve (NS) and long-term affected (AS) populations … Continue reading Long-term affected flat oyster (Ostrea edulis) haemocytes show differential gene expression profiles from naïve oysters in response to Bonamia ostreae

Analysis of farm management strategies following herpesvirus (OsHV-1) disease outbreaks in Pacific oysters in Tasmania, Australia

The microvariant genotype of Ostreid herpesvirus 1 (OsHV-1 μVar) has severely disrupted oyster production in Europe, New Zealand, and Australia by causing repeated and seasonal outbreaks of mass mortality in Pacific oysters (Magallana gigas). The virus was first detected in Tasmania, Australia, in January 2016, and mortalities of up to 87% were reported (de Kantzow et … Continue reading Analysis of farm management strategies following herpesvirus (OsHV-1) disease outbreaks in Pacific oysters in Tasmania, Australia