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Vaccination of cattle against Rhipicephalus appendiculatus with detergent solubilized tick tissue proteins and purified 20 kDa protein.

Three groups of 4 cattle have been vaccinated with either detergent solubilized tick tissue proteins (SMP) of male and female Rhipicephalus appendiculatus, a 20 kDa soluble integumental antigen, a mixture of both SMP and 20 kDa. Two weeks after one booster injection all cattle were challenged by infestation with adult ticks. Treatment had no influence on tick attachment but on cattle vaccinated by the 20 kDa 32.5% fed ticks died (p < 0.001). Moreover, the mean weight of ticks fed on 7 out of 12 vaccinated cattle was significantly lower (p < 0.05 to p < 0.001). Individual differences could be seen where the mean weight reduction was up to 30%. Moreover, ticks fed on 1 (group SMP) or 2 cattle (group 20 kDa) had some difficulties in converting their blood meal into eggs (p < 0.05 to p < 0.001).