title: Prevalence of antibodies to Toxoplasma gondii and Trichinella spiralis in 509 pigs from 31 farms in Oahu, Hawaii.
abstract: Serum samples from 509 pigs from 31 farms in Oahu, Hawaii were examined for antibodies to Toxoplasma gondii using the agglutination test in dilutions of 1:25, 1:50, and 1:500 and for Trichinella spiralis using the enzyme-linked immunosorbent assay. Toxoplasma gondii antibodies were found in 48.5% of pigs. Antibody titers were: 5.1% positive at 1:25 dilution, 28.6% positive at 1:50 dilution and 14.7% positive at 1:500 dilution. The prevalence of Toxoplasma gondii antibodies in garbage-fed pigs (67.3% of 199 pigs) was higher than in grain-fed pigs (33.8% of 180 pigs). Antibodies to Trichinella spiralis were found on seven of 31 farms. On five of these farms only a single serum was positive for Trichinella spiralis antibodies. The two remaining farms each had three positive sera (three of ten and three of 25 pigs tested); both of these farms fed garbage to pigs.
authors.affiliation: Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, USDA, ARS, Beltsville, MD 20705-2350.
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: H R
authors.initials: HR
authors.lastname: Gamble
authors.forename: A O
authors.initials: AO
authors.lastname: Rodrigues
authors.forename: P
authors.initials: P
authors.lastname: Thulliez
mesh_terms: D000372:Agglutination Tests; D000821:Animal Feed; D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood; D000913:Antibodies, Protozoan / Q000097:blood; D002523:Edible Grain; D004797:Enzyme-Linked Immunosorbent Assay; D005735:Garbage; D006254:Hawaii / Q000453:epidemiology; D006799:Housing, Animal; D015995:Prevalence; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology*; D014122:Toxoplasma / Q000276:immunology*; D014124:Toxoplasmosis, Animal / Q000453:epidemiology*; D014234:Trichinella / Q000276:immunology*; D014235:Trichinellosis / Q000453:epidemiology / Q000662:veterinary*
chemical_list: D000909:Antibodies, Helminth; D000913:Antibodies, Protozoan