California encephalitis virus endemicity in the Yukon Territory, 1972

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 (Citel...

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Bibliographic Details
Published in:The Journal of hygiene 1973-06, Vol.71 (2), p.391-402
Main Authors: McLean, D. M., Clarke, Alison M., Goddard, E. J., Manes, A. S., Montalbetti, C. A., Pearson, R. E.
Format: Article
Language:English
Subjects:
Animals
Antibodies
Antibodies, Viral
California encephalitis virus
Canada
Complement Fixation Tests
Culicidae
Encephalitis Viruses - isolation & purification
Ground squirrels
Hares
Hemagglutination Inhibition Tests
Infections
Lethal dose 50
Mammals
Mice
Mosquitos
Neutralizing antibodies
Rabbits
Sciuridae
Serotyping
Virus Replication
Viruses
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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.
ISSN:0022-1724
2396-8184
DOI:10.1017/S002217240002283X