Abstract

In 2004, Bonamia ostreae was discovered for the first time at one location in British Columbia, in the European flat oyster, Ostrea edulis. Deaths of 3- ad 4-year-old oysters at this site were associated with a severe algal bloom, but the exact correlation between the deaths and B. ostreae is not clear. Production of the European oyster is less than 1% of the total oyster production in British Columbia. No other species of oyster were affected and no transfer of oysters occurs between the Pacific and Atlantic coasts of Canada.