| exposure of swine to trichinella spiralis antigen as determined by consecutive elisas and western blot. | exposure of swine to trichinella spiralis was evaluated using a combination of 3 consecutive enzyme-linked immunosorbent assays (elisas) based on larval t. spiralis excretory-secretory antigen as screening test and western blot analysis as confirmatory test. ninety-three of 32,693 domestic swine sera collected in georgia over a 5-yr period contained antibodies specific to t. spiralis (prevalence of exposure = 0.28%). the highest prevalence (0.52%) of exposure to t. spiralis was in samples from s ... | 1997 | 9194822 |