Distribution of Echinococcus disease in Northwestern Canada.

Summary Moose, elk, caribou and reindeer have been recorded with hydatid cysts, and wolves with the adult tapeworm in Northwestern Canada. Fresh reindeer hydatid fluid was used to prepare antigen and used in intradermal tests on Indians in Canada's Northwest. The total number of natives tested with this Canadian antigen in two years was 2,022 with 31 per cent giving positive reactions.