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

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OsHV-1 and notifiable protozoa in healthy Crassostrea corteziensis cultured in two distant areas of the Gulf of California

Infectious diseases have been a major limiting factor for large scale production of oyster farming. Several factors have contributed to the emergence and spread of infectious diseases in all cultivation sites around the world. Therefore, the prevention and control of diseases has become a priority for the sustainability of global aquaculture. Crassostrea corteziensis is a … Continue reading OsHV-1 and notifiable protozoa in healthy Crassostrea corteziensis cultured in two distant areas of the Gulf of California

Morphological and functional characterization of the hemocytes from the pearl oyster Pteria hirundo and their immune responses against Vibrio infections

Hemocyte populations of the pearl oyster Pteria hirundo were characterized at morphological, ultrastructural and functional levels. Three main hemocyte populations were identified: hyalinocytes, granulocytes and blast-like cells. Hyalinocytes were the most abundant population (88.2%) characterized by the presence of few or no granules in the cytoplasm and composed by two subpopulations, large and small hyalinocytes. … Continue reading Morphological and functional characterization of the hemocytes from the pearl oyster Pteria hirundo and their immune responses against Vibrio infections

Manual of diagnostic tests for aquatic animals

Valid laboratory results are essential for Aquatic Animal Health Services to implement a range of programmes for diagnosis, surveillance and trade. This Manual of Diagnostic Tests for Aquatic Animals (Aquatic Manual) supports Aquatic Animal Health Services to provide effective laboratory testing for pathogenic agents that may adversely affect aquatic animals. (...) The World Organisation for Animal Health … Continue reading Manual of diagnostic tests for aquatic animals

Ocean acidification and pathogen exposure modulate the immune response of the edible mussel Mytilus chilensis

Ocean acidification (OA) is one of the main consequences of increasing atmospheric carbon dioxide (CO2), impacting key biological processes of marine organisms such as development, growth and immune response. However, there are scarce studies on the influence of OA on marine invertebrates' ability to cope with pathogens. This study evaluated the single and combined effects … Continue reading Ocean acidification and pathogen exposure modulate the immune response of the edible mussel Mytilus chilensis

Haemocytes from Crassostrea gigas and OsHV-1: A promising in vitro system to study host/virus interactions

Since 2008, mass mortality outbreaks associated with the detection of particular variants of OsHV-1 have been reported in Crassostrea gigas spat and juveniles in several countries. Recent studies have reported information on viral replication during experimental infection. Viral DNA and RNA were also detected in the haemolymph and haemocytes suggesting that the virus could circulate … Continue reading Haemocytes from Crassostrea gigas and OsHV-1: A promising in vitro system to study host/virus interactions

Disease and mortality among Yesso scallops Patinopecten yessoensis putatively caused by infection with Francisella halioticida

During the fall of 2015, up to 40% mortality occurred in juvenile Yesso scallops Patinopecten yessoensis at an aquaculture site in Baynes Sound, British Columbia, Canada. Macroscopic lesions were present in 11% of the scallops, and histopathology consisting of multifocal and diffuse haemocyte infiltration was observed in 44% of the specimens examined. Histologically, small Gram-negative … Continue reading Disease and mortality among Yesso scallops Patinopecten yessoensis putatively caused by infection with Francisella halioticida