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When purebred (Bos indicus) and crossbred (B. indicus × B. taurus) calves were infested in Texas 1, 2 or 3 times with 10 females and 5 males of Amblyomma americanum, resistance was acquired by both groups of calves after 1 infestation. This resulted in significant decreases in the percentages of...

George, J. E.; Osburn, R. L.; Wikel, S. K.
Journal of Parasitology, 1985, 71, 2, pp 174-182