title: Prevalence of serotype specific antibody to equine encephalosis virus in Thoroughbred yearlings in South Africa (1999-2004).
abstract: Cohorts of yearlings were sampled over a period of 6 years in a retrospective serological survey to establish the annual prevalence of serotype specific antibody to equine encephalosis virus on Thoroughbred stud farms distributed within defined geographical regions of South Africa. Seasonal seroprevalence varied between 3.6% and 34.7%, revealing both single and multiple serotype infections in an individual yearling. During the course of this study serotypes 1 and 6 were most frequently and extensively identified while the remaining serotypes 2, 3, 4, 5 and 7 were all identified as sporadic and localized infections affecting only individual horses. This study of the seasonal prevalence of equine encephalosis virus has a corollary and serves as a useful model in the seasonal incidence of the serotypes of African horse sickness and bluetongue in regions where the respective diseases are endemic.
authors.affiliation: Equine Research Centre, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110 South Africa.
authors.forename: P G
authors.initials: PG
authors.lastname: Howell
authors.forename: Jane P
authors.initials: JP
authors.lastname: Nurton
authors.forename: Daleen
authors.initials: D
authors.lastname: Nel
authors.forename: Carina W
authors.initials: CW
authors.lastname: Lourens
authors.forename: A J
authors.initials: AJ
authors.lastname: Guthrie
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000914:Antibodies, Viral / Q000097:blood*; D002519:Ceratopogonidae / Q000821:virology*; D015331:Cohort Studies; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005260:Female; D006734:Horse Diseases / Q000453:epidemiology*; D006736:Horses; D008297:Male; D018163:Orbivirus / Q000276:immunology*; D012088:Reoviridae Infections / Q000453:epidemiology / Q000662:veterinary*; D012621:Seasons; D016036:Seroepidemiologic Studies; D012703:Serotyping; D013019:South Africa / Q000453:epidemiology; D013045:Species Specificity
chemical_list: D000914:Antibodies, Viral