RANGE EXTENSION OF BONAMIA-OSTREAE TO MAINE, USA

Flat oysters, Ostrea edulis L., were collected from the Damariscotta R iver, Maine, in September of 1991 and 1992 and from Tomales Bay, Calif ornia, in October of 1991 and 1992. Histological examination revealed infections with Bonamia ostreae in 34 and 45% of the flat oysters from Maine and in 31 and 12% of those from California. The history of oyst er movements between geographic locations suggested that the source of bonaniasis in flat oysters in Maine was infected flat oysters from Ca lifornia. (C) 1994 Academic Press, Inc.