title: National seroprevalence of Toxoplasma gondii in pigs.
abstract: Serum samples from 11,842 commercial pigs killed in 1983-1984 throughout the United States were tested for anti-Toxoplasma gondii antibodies by the agglutination test in dilutions of 1:25, 1:50, and 1:500. Anti-T. gondii antibodies were found in 23.9% of pigs. At dilutions of 1:25, 1:50, and 1:500, 13.5%, 6.9%, and 3.5% were serologically positive, respectively. The prevalence of anti-T. gondii antibodies was higher in breeder pigs (42%) than in market pigs (23%). These results indicate that anti-T. gondii antibodies are widespread in the national swine herd.
authors.affiliation: Livestock and Poultry Sciences Institute, Beltsville Agricultural Research Center-East, Maryland 20705-2350.
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: J C
authors.initials: JC
authors.lastname: Leighty
authors.forename: V C
authors.initials: VC
authors.lastname: Beal
authors.forename: W R
authors.initials: WR
authors.lastname: Anderson
authors.forename: C D
authors.initials: CD
authors.lastname: Andrews
authors.forename: P
authors.initials: P
authors.lastname: Thulliez
mesh_terms: D000818:Animals; D000913:Antibodies, Protozoan; D012698:Serologic Tests; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology*; D014122:Toxoplasma / Q000276:immunology; D014124:Toxoplasmosis, Animal / Q000453:epidemiology*; D014481:United States
chemical_list: D000913:Antibodies, Protozoan