Diseases
"Dermo" (Perkinsus marinus) is a marine disease of oysters, caused by a protozoan parasite. It is a prevalent pathogen of oysters, causing massive mortality in oyster populations, and poses a significant economic threat to the oyster industry.
"MSX" (Haplosporidium nelsoni), another protozoan, was first described along the mid-Atlantic coast in 1957. Mortalities can reach 90% to 95% of the oyster population within 2 to 3 years of being seeded. MSX slows the feeding rates of infected oysters, leading to a reduction in the amount of stored carbohydrates, which in turn inhibits normal gametogenesis during spawning, resulting in reduced fecundity.
Read more about this topic: Eastern Oyster
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—Henry S. Canby (1878–1961)