Canada imposes restrictions after detecting oyster-threatening Dermo parasite in Egmont Bay
A dangerous parasitic infection affecting oysters, Dermo, has been detected in Egmont Bay on Prince Edward Island. Authorities have restricted mollusc movement and increased surveillance.
Photo: Andrew Cannizzaro, CC BY 2.0
CANADA — The Canadian Food Inspection Agency (CFIA) confirmed the presence of the parasite Perkinsus marinus, which causes Dermo disease, in oyster samples collected in Egmont Bay, Prince Edward Island.
This is the first confirmed case of Dermo in the province. The disease poses no risk to humans and does not affect seafood safety, but it significantly increases oyster mortality and slows their growth.
CFIA, Fisheries and Oceans Canada, and the Government of PEI have introduced movement restrictions for oysters, are investigating the source of the infection, and have enhanced epizootic monitoring involving scientists, producers, and harvesters.
These actions are part of the One Health approach and are supported by Canada’s National Aquatic Animal Health Program.
The agency urges the public to report any sudden increases in oyster mortality or signs of slow growth.
Dermo is a parasitic disease in oysters caused by the single-celled organism Perkinsus marinus. It affects oysters by causing:
- mass mortality,
- slowed growth,
- deterioration of overall population health.
Is Dermo dangerous to humans?
No, Dermo is completely harmless to humans. It is not transmissible to people and does not affect seafood safety.