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Experiments on Oral* Secretion of the Rocky Mountain Wood Tick, Dermacentor andersoni Stiles (Acarina: Ixodidae)1

Published online by Cambridge University Press:  31 May 2012

J. D. Gregson
J. D. Gregson
Affiliation:
Veterinary and Medical Entomology Section, Entomology Laboratory, Kamloops, B.C.
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Extract

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.

Type
Articles
Information
The Canadian Entomologist , Volume 89 , Issue 1 , January 1957 , pp. 1 - 5
Copyright
Copyright © Entomological Society of Canada 1957

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References

Gregson, J. D. 1944. The influence of fertility on the rate of feeding of the female wood tick Dermacentor andersoni Stiles. 74th Ann. Rept. Ent. Soc. Ontario, 1943, pp. 46–47.Google Scholar
Gregson, J. D. 1947. Feeding periods prerequisite to the mating of Dermacentor andersoni Stiles. Proc. Ent. Soc. British Columbia 43: 3–6.Google Scholar
Gregson, J. D. 1953. Review of recent contributions to the study of tick paralysis in North America. Proc. VI Int. Congr. Microbiol. 5: 507–511.Google Scholar
Rose, I., and Gregson, J. D.. 1956. Evidence of a neuromuscular block in tick paralysis. Nature 178: 95–96.CrossRefGoogle ScholarPubMed
Todd, J. L. 1912. Tick bite in British Columbia. J. Can. Med. Assoc. 2: 1118.Google ScholarPubMed