The enigma of tick paralysis

Th e objec t of th is pape r is to brin g toge ther obse n 'ati ons on a se ri es of tick para lys is expnim ents th a t have bee n CO Il,ducted a t th e Li ves tock Insec t L aho ra tor y of th e D omin ion D t' partment of A g r iculture, Scie nce Sen'ice; to compa re th em wi th th e fo rms of t ick pa ra lysis th a t occur in (;th cr co untri es, a lld by th ese compa r isc ns to c la ri fy our impressio ns regarding th e tru e na ture o f th e d isease . Th ese ex peri em t m s, often nega t il'e a nd at t imes a pparen t ly produc in g co ntradi cto ry results, a t leas t do emph asize th e f asc in a tin g m ystery of one of British Col umb ia's m a in livestoc k pests, th e wood tic k, D ermacentor rmril'l"soni St i les.