Larval Echinococcus multilocularis was found in one of 25 Peromyscus maniculatus collected in a dolomite quarry near Gunton, about 30 miles north of Winnipeg. This finding shows that E. multilocularis is present in Manitoban rodents at least in an area of 60 sq. mi.
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Chiu-Fan Lee (1969) studied this question.