Study of the Impact of the Parasitic Microalgae on the Health of Bivalve .

The invasion of bivalves by parasitic microalgae is widespread and causes pathologies and dysfunctions of the organs, especially in the most valuable products: the mantle and the muscle. The pathogenesis of the disease remains completely unknown. In this study, based on a macroscopic examination of and microalgae count in each infected individual, four stages of disease development with characteristic pathognomonic symptoms were described.