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“TICK PARALYSIS” IN MAN AND ANIMALS. 
FURTHER PUBLISHED RECORDS, WITH COMMENTS. 
By G. H. F. NUTTALL, F.R.S. 
{From the Quick Laborator)/, University of Cambridge.) 
Since the appearance of the papers by Hadwen and myself dealing 
with the subject of “ Tick Paralysis',” I have had my attentiou drawn 
to two interesting papers. The reference to the first paper, by 
Borthwick (1905), was found whilst compiling Part II of the Biblio¬ 
graphy of the Ixodoidea, and secondly, I am indebted to the author, 
Dr I. U. Temple, of Pendleton, Oregon, for sending me a copy of his 
valuable contribution. The latter appeared in a journal which will 
scarcely be accessible to European readers, and I therefore have no 
hesitation in reprinting the greater part of it below. The following 
account is condensed from the paper by Borthwick (vil. 1905, pp. 
33-35). 
“ Tick Paralysis ” in Sheep in Gape Colony. 
Borthwick states that “Tick Paralysis” occurs over a large area 
of Cape Colony, and that the affection has for many years been 
recognised by sheep farmers there who unanimously attribute it to the 
attacks of Ixodes pilosus. The disease had prevailed to an unusual 
degree during the preceding winter on certain specified farms on 
the Fish River Rand and in Somerset East District. The affection 
occurs most commonly in May—June on sheep runs in long and bushy 
veld. 
Symptoms. At first the affected sheep, whilst grazing, are observed 
to lag behind the rest of the flock; they lie down, but rise and walk 
' See Hadwen (x. 1913). Parasitology, yi, 283 —297 ; Hadwen and Nuttall. Ibid., 299 — 
301, where references to earlier authors will be found on p. 297. 
