The Canadian Food Inspection Agency (CFIA) has confirmed the presence of multinuclear sphere X (MSX) caused by Haplosporidium nelsoni in additional locations on Prince Edward Island (PEI), including areas between Lennox Island and Freeland. While MSX prevents oysters from thriving, such as decreased rates of growth and increased oyster mortality, it is important to note that this disease poses no risk to human health, nor does it pose a food safety risk.