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Bunyavirus isolations from mosquitoes in the western Canadian Arctic

Published online by Cambridge University Press:  15 May 2009

D. M. McLean ,
P. N. Grass ,
B. D. Judd ,
L. V. Ligate  and
K. K. Peter
D. M. McLean
Affiliation:
Division of Medical Microbiology, University of British Columbia, Vancouver, B.C., V6T 1W5, Canada
P. N. Grass
Affiliation:
Division of Medical Microbiology, University of British Columbia, Vancouver, B.C., V6T 1W5, Canada
B. D. Judd
Affiliation:
Division of Medical Microbiology, University of British Columbia, Vancouver, B.C., V6T 1W5, Canada
L. V. Ligate
Affiliation:
Division of Medical Microbiology, University of British Columbia, Vancouver, B.C., V6T 1W5, Canada
K. K. Peter
Affiliation:
Division of Medical Microbiology, University of British Columbia, Vancouver, B.C., V6T 1W5, Canada
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Strains of California encephalitis virus (snowshoe hare subtype) were isolated from 8 of 475 pools comprising 23747 unengorged female mosquitoes of five species collected at three of six locations throughout the Mackenzie Valley of the Northwest Territories, Canada, from latitudes 60 to 69° N between 10 and 24 July 1976. Minimum field infection rates included 1:2734 for Aedes communis, 1:256 to 1:3662 for A. hexodontus and 1:911 to 1:1611 for A. punctor. Northway virus was also isolated from 1 of 3662 A. hexodontus mosquitoes collected at Inuvik (69° N, 135° W). Transmission of CE virus by A. communis infected by feeding on virus in defibrinated blood and incubation at 0, 13 and 23 °C for 13–20 days clearly demonstrates the importance of this species as a natural vector, and transmission of CE virus by Culiseta inornata after incubation at 0 and 13 °C following intrathoracic injection strengthens evidence of its role as a natural vector. Immunofiuorescence was less reliable than imunoperoxidase for detection of CE viral antigen in mosquito salivary glands.

Type
Research Article
Information
Journal of Hygiene , Volume 79 , Issue 1 , August 1977 , pp. 61 - 71
Copyright
Copyright © Cambridge University Press 1977

References

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