“…In North America, the adult form of T. crassiceps has been reported in arctic fox (Alopex lagopus) (Rausch, 1952), red fox (Vulpes vulpes) (Freeman, 1954), and wolves (Canis lupus) (Freeman, 1961). Natural infections with T. crassiceps larvae have also been reported in lemmings (Dicrostonyx groenlandicus and Lemmus trimurcronatus) (Rausch, 1952), eastern chipmunks (Tamias striatus) (Freeman, 1954), muskrats (Ondatra zibethicus) (Freeman, 1954), meadow voles (Microtus pennsylvanicus) (Freeman, 1954), woodchucks (Freeman, 1962;Beaudoin et al, 1969;Albert et al, 1972;Shiga et al, 1987;Anderson et al, 1990), and in a black lemur (Eulemur macaco) (Dyer and Greve, 1998).…”