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

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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

Phylogeography and connectivity of molluscan parasites: Perkinsus spp. in Panama and beyond

Panama is a major hub for commercial shipping between two oceans, making it an ideal location to examine parasite biogeography, potential invasions, and the spread of infectious agents. Our goals were to (i) characterise the diversity and genetic connectivity of Perkinsus spp. haplotypes across the Panamanian Isthmus and (ii) combine these data with sequences from … Continue reading Phylogeography and connectivity of molluscan parasites: Perkinsus spp. in Panama and beyond

Perkinsus infection is associated with alterations in the level of global DNA methylation of gills and gastrointestinal tract of the oyster Crassostrea gasar

Bivalves are filter feeders that obtain food from seawater that may contain infectious agents, such as the protozoan parasites Perkinsus marinus and P. olseni that are associated with massive mortalities responsible for losses in the aquaculture industry. Despite all physical and chemical barriers, microorganisms cross epithelia and infect host tissues to cause pathologies. Epigenetics mechanisms … Continue reading Perkinsus infection is associated with alterations in the level of global DNA methylation of gills and gastrointestinal tract of the oyster Crassostrea gasar

Survey of bivalve molluscs for Bonamia spp. and other parasitic pathogens in Florida east coast lagoons

A 2007 study of Suminoe (Crassostrea ariakensis) and eastern (Crassostrea virginica) oysters exposed to Indian River Lagoon (IRL), Florida waters revealed the presence of Bonamia spp. in exposed oysters. In 2010, a survey of oysters and other bivalves (n = 721, 18 species) was conducted in the southern IRL (10 sites) and in the more … Continue reading Survey of bivalve molluscs for Bonamia spp. and other parasitic pathogens in Florida east coast lagoons

Possible impacts of zoosporic parasites in diseases of commercially important marine mollusc species: part I. Perkinsozoa

The phylum Perkinsozoa includes well-known parasites of commercially important species of molluscs in aquaculture, such as Perkinsus marinus, a virulent pathogen of the eastern oyster, Crassostrea virginica, and in wild populations in many marine ecosystems throughout the world. These parasites are responsible for significant losses in aquaculture production. For this reason, much research has already … Continue reading Possible impacts of zoosporic parasites in diseases of commercially important marine mollusc species: part I. Perkinsozoa

Genetic signature analysis of Perkinsus marinus in Mexico suggests possible translocation from the Atlantic Ocean to the Pacific coast of Mexico

  Background The protozoan Perkinsus marinus (Mackin, Owen & Collier) Levine, 1978 causes perkinsosis in the American oyster Crassostrea virginica Gmelin, 1791. This pathogen is present in cultured C. virginica from the Gulf of Mexico and has been reported recently in Saccostrea palmula (Carpenter, 1857), Crassostrea corteziensis (Hertlein, 1951) and Crassostrea gigas (Thunberg, 1793) from … Continue reading Genetic signature analysis of Perkinsus marinus in Mexico suggests possible translocation from the Atlantic Ocean to the Pacific coast of Mexico