This was the first report of a test to detect recent incidence of virulent footrot in sheep based on testing blood samples. D. nodosus antigen was injected subcutaneously and blood was collected a few days later to measure an anamnestic response in an ELISA.
Whittington, R. J. and Marshall, D. J. (1990) An anamnestic serological test for ovine footrot. Australian Veterinary Journal, 67, 157-158. 10.1111/j.1751-0813.1990.tb07744.x
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