title: Prevalence of antibodies to Sarcocystis neurona, Toxoplasma gondii and Neospora caninum in horses from Argentina.
abstract: Sera from 76 horses from Argentina were examined for antibodies to Sarcocystis neurona, Toxoplasma gondii and Neospora caninum. Antibodies to S. neurona were found in 27 (35.5%) of 76 horses using immunoblots with culture derived merozoites as antigen. Antibodies to T. gondii were found in 10 (13.1%) of 76 horses by using the modified agglutination test with formalin-fixed tachyzoites and mercaptoethanol; titers were 1:25 (two horses), 1:50 (six horses), 1:100 (two horses), and 1:200 (one horse). Antibodies to N. caninum were not found in any of the 76 horses by the use of N. caninum agglutination test. This is the first report of S. neurona infection in horses in Argentina.
authors.affiliation: Parasite Biology and Epidemiology Laboratory, United States Department of Agriculture, Agricultural Research Service, Livestock and Poultry Sciences Institute, Beltsville, MD 20705-2350, USA. jdubey@lpsi.barc.usda.gov
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: M C
authors.initials: MC
authors.lastname: Venturini
authors.forename: L
authors.initials: L
authors.lastname: Venturini
authors.forename: J
authors.initials: J
authors.lastname: McKinney
authors.forename: M
authors.initials: M
authors.lastname: Pecoraro
mesh_terms: D000372:Agglutination Tests / Q000662:veterinary; D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood; D001118:Argentina / Q000453:epidemiology; D015153:Blotting, Western / Q000662:veterinary; D003048:Coccidiosis / Q000453:epidemiology / Q000662:veterinary*; D006734:Horse Diseases / Q000453:epidemiology* / Q000469:parasitology; D006736:Horses; D018688:Neospora / Q000276:immunology* / Q000302:isolation & purification; D012522:Sarcocystis / Q000276:immunology* / Q000302:isolation & purification; D012523:Sarcocystosis / Q000453:epidemiology / Q000662:veterinary; D016036:Seroepidemiologic Studies; D014122:Toxoplasma / Q000276:immunology* / Q000302:isolation & purification; D014124:Toxoplasmosis, Animal / Q000453:epidemiology
chemical_list: D000913:Antibodies, Protozoan