Kazacos K R, Edberg E O
J Am Vet Med Assoc. 1979 Nov 1;175(9):909-10.
Between October 1976 and January 1977, carcasses or hearts and lungs from 202 wild foxes and coyotes in Indiana were collected to determine the prevalence of Dirofilaria immitis infection. Three of 113 (2.7%) red foxes (Vulpes fulva), 3 of 81 (3.7%) gray foxes (Urocyon cinereoargenteus), and 1 of 8 (12.5%) coyotes (Canis latrans) were infected with D immitis. An average of 5 worms (range, 1 to 10) were recovered from foxes and 11 worms were recovered from the coyote. Worms from the coyote were of normal length and all female worms contained developing embryos and microfilariae. Worms from foxes were small, and none of the female worms contained developing embryos.
1976年10月至1977年1月期间，采集了印第安纳州202只野生狐狸和郊狼的尸体或心脏及肺脏，以确定犬恶丝虫感染的流行情况。113只赤狐（赤狐属）中有3只（2.7%）、81只灰狐（灰狐属）中有3只（3.7%）、8只郊狼（犬属）中有1只（12.5%）感染了犬恶丝虫。从狐狸体内平均检出5条虫（范围为1至10条），从郊狼体内检出11条虫。郊狼体内的虫长度正常，所有雌虫均含有发育中的胚胎和微丝蚴。狐狸体内的虫较小，雌虫均未含有发育中的胚胎。
