| application of elisa to the serological diagnosis of virulent ovine footrot. | the sensitivity and specificity of an elisa that detects antibody in the serum of sheep against dichelobacter nodosus was investigated. the sensitivity of the assay was determined in two trials in which sheep free of virulent footrot were exposed to a virulent strain of d. nodosus. in the first trial up to 96.6% of sheep that developed severe foot lesions were seropositive 2 weeks later. the proportion of seropositive sheep depended on the interval between exposure to d. nodosus and collection o ... | 1994 | 7801518 |