The tick in his jaw belied how tightly his teeth were clamped.
In the United States alone the annual pecuniary loss in cattle stock occasioned by the ravages of this tick disease was computed in 1907 at one hundred million dollars.
From the foregoing epitome which applies to many species, Rhipicephalus appendiculatus for example, it is evident that every individual tick has to find a host on three occasions, namely, as larva, nymph and adult.
The common sheep-tick (Ixodes vicinus) of England, for example, infects cattle and dogs as well as sheep; and the pathogenetic Ixodidae above mentioned occur parasitically upon other mammals than those to which they convey the diseases specified.
Amblyomma hebraeum, the bont or variegated tick of the Cape Colonists, infects sheep with the 9porozoon causing "heart-water" sickness, and in Europe sheep are inoculated with the same disease by another tick, Rhipicephalus bursa.