Abstract
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).
Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.
Keywords: Dirofilaria immitis, heartworm, dogs, prevalence, Canada
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Selected References
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- Slocombe J. O. Heartworm in dogs in Canada in 1977. Can Vet J. 1978 Sep;19(9):244–247. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1978. Can Vet J. 1979 Oct;20(10):284–287. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1979. Can Vet J. 1980 May;21(5):159–161. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1980. Can Vet J. 1981 Jun;22(6):201–203. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1981. Can Vet J. 1982 Jul;23(7):219–221. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1982. Can Vet J. 1983 Jul;24(7):227–229. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1983. Can Vet J. 1984 Sep;25(9):347–350. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O., McMillan I. Heartworm in dogs in Canada in 1984. Can Vet J. 1985 Oct;26(10):323–327. [PMC free article] [PubMed] [Google Scholar]