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Transmission of Northway and St. Louis encephalitis viruses by arctic mosquitoes

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Summary

Transmission of a Canadian arctic isolate of Northway virus has been demonstrated after incubation of arcticAedes communis mosquitoes at 13° C for 27 days after intrathoracic injection of 300 plaque forming units of virus. Replication has also been demonstrated after intrathoracic injection of domesticA. aegypti mosquitoes of this virus. Virions of Northway virus, 84–92 nm diameter were morphologically typical of a bunyavirus after propagation in salivary glands ofA. communis or in tissue cultures of baby hamster kidney (BHK-21) cells. An Ontario isolate of St. Louis encephalitis was transmitted by bites ofA. communis after 27 days incubation at 13° C after oral ingestion of 3 or 30 mouse LD50 virus. This mosquito species transmitted virus after 13 to 76 days incubation at 13° C following intrathoracic injection of 3 mouse LD50 or higher virus doses.

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Authors and Affiliations

  1. Division of Medical Microbiology, University of British Columbia, Vancouver, Canada

    D. M. McLean, P. N. Grass, B. D. Judd, K. J. Stolz & K. K. Wong

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  1. D. M. McLean
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  2. P. N. Grass
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  3. B. D. Judd
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  4. K. J. Stolz
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  5. K. K. Wong
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Additional information

Supported through the Medical Research Council Canada Grant MT-2811 and the National Research Council Canda Contract 031-604.

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McLean, D.M., Grass, P.N., Judd, B.D. et al. Transmission of Northway and St. Louis encephalitis viruses by arctic mosquitoes. Archives of Virology 57, 315–322 (1978). https://doi.org/10.1007/BF01320071

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  • DOI: https://doi.org/10.1007/BF01320071

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