Slocombe J O, McMillan I
Can Vet J. 1989 Jun;30(6):504-8.
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%).Heartworm was reported from Alberta, Manitoba, Ontario, Quebec, Nova Scotia and New Brunswick, but most (389) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 22 cases reported from Quebec, mostly from and around Montreal, and 24 from Manitoba, mostly from Selkirk, Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 76% of the cases had a history of not having left Canada, and 24% were observed with clinical signs of heartworm disease.
1988年11月下旬，向加拿大各地的1581家小型和综合动物诊所及机构兽医发放了一份调查问卷，以评估1988年加拿大犬恶丝虫的感染状况，其中46%作出了回应。兽医报告称，共有181,577只犬接受了心丝虫病血液检测，发现367只犬感染了犬恶丝虫微丝蚴。另有60只犬无微丝蚴血症，但被诊断为心丝虫病，因此1988年确诊病例总数为441例（0.24%）。艾伯塔省、马尼托巴省、安大略省、魁北克省、新斯科舍省和新不伦瑞克省均有犬恶丝虫感染报告，但大多数病例（389例）来自安大略省。安大略省西南部仍是加拿大感染的主要集中区域。魁北克省报告了22例病例，大多来自蒙特利尔及其周边地区；马尼托巴省报告了24例，大多来自塞尔扣克、温尼伯及其周边地区。犬恶丝虫感染最常发生在主要饲养于农村户外的三岁以上宠物犬身上。约76%的病例没有离开加拿大的记录，24%出现了犬恶丝虫病的临床症状。
