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The efficacy of a serological test (ELISA with excretory-secretory products of Fasciola hepatica as an antigen) for the diagnosis of bovine fasciolosis was assessed under field conditions using pools of sera from 170 herds. Blood samples were collected from six to ten heifers and from five to ten adults in each herd. In 92 of the herds (Group 1) the animals had not been treated for fasciolosis; in...
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