| diagnosis of naturally occurring fasciola hepatica infections in cattle with an enzyme-linked immunosorbent assay. | sera from 100 herds of cattle located in the state of washington were examined with an enzyme-linked immunosorbent assay for antibody to fasciola hepatica in a screening procedure that included 5 to 10 samples/herd. twenty-eight herds contained infected cattle and f hepatica was most prevalent in 3 distinct geographic areas. subsequent retesting of all sera available from 14 herds (mean of 109 samples/herd) revealed that the screening procedure correctly detected 7 of 7 operations in which great ... | 1984 | 6367559 |