Regarding the economic importance of bivalve farming, a great deal of interest has recently been devoted to studying the pathogenesis of infectious diseases of these mollusks to prepare for public health emergencies. is one of these pathogens; it is a ubiquitous soil bacterium responsible for many types of gastrointestinal diseases associated with food. This study was conducted to determine the pathogenic effect of on . This effect was studied by assessing hemocytes death using flow cytometry analysis. The results showed that only ∼15% of were able to survive after artificial infection with 10 CFU (colony-forming unit)/oyster. Evenly, the percentage of nonviable hemocytes gradually increased with the concentration of , with a peak value of ∼40% after infection. Indeed, findings showed that this strain is harmful to .
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