Lethal Temperatures for Dermacentor andersoni Stiles and Other Ticks in British Columbia

1942 ◽  
Vol 35 (4) ◽  
pp. 562-564
Author(s):  
Allen G. Mail
Keyword(s):  
British Columbia ◽  
Dermacentor Andersoni ◽  
Lethal Temperatures

Experiments on Oral Secretion of the Rocky Mountain Wood Tick, Dermacentor andersoni Stiles (Acarina: Ixodidae)

1957 ◽  
Vol 89 (1) ◽  
pp. 1-5 ◽  
Author(s):  
J. D. Gregson
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Rocky Mountain ◽  
Dermacentor Variabilis ◽  
Oral Secretion ◽  
Amblyomma Maculatum ◽  
Dermacentor Andersoni ◽  
The Pacific ◽  
Tick Paralysis ◽  
Rocky Mountain Wood Tick

Tick paralysis continues to be one of the most baffling and fascinating tickborne diseases in Canada. It was first reported in this country by Todd in 1912. Since then about 250 human cases, including 28 deaths, have been recorded from British Columbia. Outbreaks in cattle have affected up to 400 animals at a time, with losses in a herd as high as 65 head. Although the disease is most common in the Pacific northwest, where it is caused by the Rocky Mountain wood tick, Dermacentor andersoni Stiles, it has lately been reported as far south as Florida and has been produced by Dermacentor variabilis Say, Amblyomma maculatum Koch, and A. americanum (L.) (Gregson, 1953). The symptoms include a gradual ascending symmetrical flaccid paralysis. Apparently only man, sheep, cattle, dogs, and buffalo (one known instance) are susceptible, but even these may not necessarily be paralysed.

Host Susceptibility to Paralysis by the Tick Dermacentor andersoni Stiles (Acarina: Ixodidae)

1958 ◽  
Vol 90 (7) ◽  
pp. 421-424 ◽  
Author(s):  
J. D. Gregson
Keyword(s):  
British Columbia ◽  
Laboratory Animal ◽  
Domestic Animals ◽  
Host Susceptibility ◽  
Dermacentor Andersoni ◽  
Tick Paralysis

One of the objectives in the study of tick paralysis at Kamloops was to discover a species of laboratory animal that is consistently susceptible to this disease. Such an animal was needed to explore inconsistencies probably caused by differences in tick virulence or host susceptibility. Observations on infestations of adults of Dermacentor andersoni in tick paralysis areas in British Columbia, and experiments with similar ticks on large and small wild and domestic animals, have revealed the following.

Ticks in Relation to Certain Diseases of Man and Animals in Canada

1964 ◽  
Vol 96 (1-2) ◽  
pp. 112-112
Author(s):  
J. D. Gregson
Keyword(s):  
British Columbia ◽  
Ixodes Pacificus ◽  
Dermacentor Andersoni ◽  
Dermacentor Albipictus ◽  
Tick Paralysis

In Canada eight species of ticks are implicated with ten and possibly seventeen diseases of man and animals. The most important of these, tick paralysis, is caused by Dermacentor andersoni Stiles, and of three hundred human cases in British Columbia since 1910, thirty have been fatal. In livestock, outbreaks have involved up to four hundred cattle in a single herd, with losses of up to fifty head. Other diseases resulting from tick toxins include a paralysis of cattle by Oyobius megnini Dugès, which has caused twelve deaths since 1955; occasional deaths in deer and moose from heavy infestations of Dermacentor albipictus (Packard); and slow-healing sores in man resulting from the bites of Ixodes pacificus Cooley and Kohls.

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