| prevalence of antibodies to toxoplasma gondii and trichinella spiralis in 509 pigs from 31 farms in oahu, hawaii. | 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 (6 ... | 1992 | 1496803 |