The Canadian nurse . ralysis, having been in British Co-lumbia prior to his illness. The Tick The tick, once attached, may takefrom 7-10 days to become fully en-gorged at which time it will drop is usually a lapse of approxi-mately five days between the attach-ment of the tick and symptoms ofparalysis. The actual mechanism bywhich the tick causes paralysis is notunderstood but extensive research isbeing conducted concerning this at theEntomology laboratory in Kamloops. Ticks are found between the monthsof February and August, but are mustabundant in the months of April, Mayand June.
The Canadian nurse . ralysis, having been in British Co-lumbia prior to his illness. The Tick The tick, once attached, may takefrom 7-10 days to become fully en-gorged at which time it will drop is usually a lapse of approxi-mately five days between the attach-ment of the tick and symptoms ofparalysis. The actual mechanism bywhich the tick causes paralysis is notunderstood but extensive research isbeing conducted concerning this at theEntomology laboratory in Kamloops. Ticks are found between the monthsof February and August, but are mustabundant in the months of April, Mayand June. Contrary to the widespread,erroneous belief that ticks fall onto aperson from trees, actually they arefound on gras-, and shrubs along ani-mal trails, where they lie dormant andwait for passing animals or brushed against they attachthemselves and rapidly climb up the •Rose. Ian. MB, (London) :A Kevin <.i Tick Paralysis, CanadianMedical Association Journal 1954. 134 THE CANADIAN NIRSK. FEBRUARY. 1955 • Vol. 51. No. 2 135 body. They may adhere firmly to anypart of the body but the commonestsite is the parietal region of the heador the neck just above the hairline.(Approximately 60-70% are discover-ed within these areas.) Tick ParalysisPrior to the onset of actual paraly-sis, there may be a period of vaguecomplaints including irritability, painor paresthesia in the lower extremities12-24 hours before the onset of paraly-tic symptoms. The prodromal statedoes not always occur and the firstsymptoms may be those of the paralysis— which include staggering and in-coordination of movements. Within afew hours lower extremity paralysisis evident. If not diagnosed, and ifthe tick is not removed, the paralysisspreads to the upper extremities within12-24 hours. After this phase, progressis rapid. A bulbar paralysis developswith dysarthria, lingual, facial, ocular,and finally respiratory paralysis thatmay result in death. DifferentiationTick paralysis with
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