A comprehensive review of the acquisition of resistance in bovine and laboratory hosts as a result of natural infestation with various species of ticks is undertaken. In this review I discuss the biological aspects of the expression of resistance, deal with acquisition of resistance to ticks by bovine and laboratory animals, give details on the environmental and physiological factors which affect the resistance and explain the mechanisms of resistance in both bovine and laboratory animals. I also deal with the relationships between ticks and their bovine hosts and emphasize the difference in the acquired resistance of individuals in the breed as well as the negative correlation between the decrease in mean weight of the ticks and the increase in the levels of globulins in the serum of the different hosts.
Aspects of cross resistance by hosts to different species of ticks are also discussed in this review.
