Seroprevalence of maedi-visna in Canadian sheep.
A serological survey of Canadian sheep over one year of age was conducted to estimate the seroprevalence of maedi-visna. An indirect enzyme-linked immunosorbent assay was used. An analysis of 14,047 sera from 286 randomly selected flocks provided an estimate of the seroprevalence of 19% and a mean flock prevalence of 12%. Sixty-three percent of the sampled flocks had one or more seropositive sheep. There appeared to be higher prevalences in sheep in Quebec (40%) and Nova Scotia (27%). An increased prevalence with increased age and flock size was noted.
Simard
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Health of Animals Laboratory, Agriculture Canada, New Brunswick.
Morley
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RS
D000367:Age Factors; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D001947:Breeding; D002170:Canada / Q000453:epidemiology; D004797:Enzyme-Linked Immunosorbent Assay; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000453:epidemiology*; D015995:Prevalence; D012756:Sheep; D014790:Visna-maedi virus / Q000276:immunology*
D000914:Antibodies, Viral