title: Prevalence of Maedi-visna in Saskatchewan sheep.
abstract: A study was conducted to estimate flock and individual seroprevalence of Maedi-visna in Saskatchewan and evaluate risk factors for seropositive flocks. Thirty-five percent (24/68) of flocks and 4.6% (93/2010) of individual samples were positive. Within-flock prevalence ranged from 3.3% to 96.7%. Significant flock-level predictors of flock prevalence included large flock size, purchasing > 50 sheep and respiratory problems in the previous 5 years.
authors.affiliation: Living Skies Veterinary Services P.C. Ltd., Chaplin, Saskatchewan (Heinrichs); Government of Saskatchewan, Ministry of Agriculture Livestock Branch, Saskatoon, Saskatchewan (Wilkins); Saskatchewan Sheep Development Board, Saskatoon, Saskatchewan (Schroeder); Western College of Veterinary Medicine, Saskatoon, Saskatchewan (Campbell).
authors.forename: Rhonda
authors.initials: R
authors.lastname: Heinrichs
authors.affiliation: Living Skies Veterinary Services P.C. Ltd., Chaplin, Saskatchewan (Heinrichs); Government of Saskatchewan, Ministry of Agriculture Livestock Branch, Saskatoon, Saskatchewan (Wilkins); Saskatchewan Sheep Development Board, Saskatoon, Saskatchewan (Schroeder); Western College of Veterinary Medicine, Saskatoon, Saskatchewan (Campbell).
authors.forename: Wendy
authors.initials: W
authors.lastname: Wilkins
authors.affiliation: Living Skies Veterinary Services P.C. Ltd., Chaplin, Saskatchewan (Heinrichs); Government of Saskatchewan, Ministry of Agriculture Livestock Branch, Saskatoon, Saskatchewan (Wilkins); Saskatchewan Sheep Development Board, Saskatoon, Saskatchewan (Schroeder); Western College of Veterinary Medicine, Saskatoon, Saskatchewan (Campbell).
authors.forename: Gordon
authors.initials: G
authors.lastname: Schroeder
authors.affiliation: Living Skies Veterinary Services P.C. Ltd., Chaplin, Saskatchewan (Heinrichs); Government of Saskatchewan, Ministry of Agriculture Livestock Branch, Saskatoon, Saskatchewan (Wilkins); Saskatchewan Sheep Development Board, Saskatoon, Saskatchewan (Schroeder); Western College of Veterinary Medicine, Saskatoon, Saskatchewan (Campbell).
authors.forename: John
authors.initials: J
authors.lastname: Campbell
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D005260:Female; D008297:Male; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000453:epidemiology / Q000821:virology*; D015995:Prevalence; D012525:Saskatchewan / Q000453:epidemiology; D016036:Seroepidemiologic Studies; D012756:Sheep; D014790:Visna-maedi virus / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral