The Canadian Food Inspection Agency (CFIA) has confirmed the presence of Haplosporidium nelsoni (also known as multinucleate sphere unknown (MSX)) in American oysters (Crassostrea virginica) collected in Bedeque Bay, Prince Edward Island on July 11, 2024. This is the first case of MSX in Prince Edward Island.
A primary control zone has been declared for the area in and around Bedeque Bay, Prince Edward Island.
Update July 23, 2024: Additional primary control zones have been declared for Birds Island to Black Banks, New London Bay / Stanley Bridge, and Boughton River, Prince Edward Island.