California encephalitis virus endemicity in the Yukon Territory, 1972

SUMMARY Sera from 218 of 1574 (14%) small mammals collected in the Yukon Territory between 14 May and 13 August 1972 neutralized a Yukon strain of California encephalitis virus (snowshoe-hare subtype). These included 133 of 319 (42%) snowshoe hares ( Lepus americanus ), 84 of 1243 (7%) ground squirr...

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Bibliographic Details
Published in:Journal of Hygiene
Main Authors: McLean, D. M., Clarke, Alison M., Goddard, E. J., Manes, A. S., Montalbetti, C. A., Pearson, R. E.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1973
Subjects:
Whitehorse
Yukon
Online Access:http://dx.doi.org/10.1017/s002217240002283x
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002217240002283X
Description
Summary:SUMMARY Sera from 218 of 1574 (14%) small mammals collected in the Yukon Territory between 14 May and 13 August 1972 neutralized a Yukon strain of California encephalitis virus (snowshoe-hare subtype). These included 133 of 319 (42%) snowshoe hares ( Lepus americanus ), 84 of 1243 (7%) ground squirrels ( Citellus undulatus ) and 1 of 12 (8%) tree squirrels ( Tamiasciurus hudsonicus ). California encephalitis virus (snow-shoe hare subtype) was isolated from four pools of unengorged Aedes communis mosquitoes collected near Whitehorse (61° N., 135° W.) and on one occasion each from pools of the same species collected at Hunker Creek (64° N., 138° W.) and at mile 125, Dempster Highway (66° N., 138° W.) during July 1972. Replication of a Yukon strain of California encephalitis virus was observed in wild-caught Culiseta inornata and Aedes canadensis mosquitoes after intrathoracic injection and holding at temperatures of 80°, 50° and 40° F.

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