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The ecology of Whataroa virus, an alphavirus, in South Westland, New Zealand

Published online by Cambridge University Press:  15 May 2009

J. A. R. Miles
J. A. R. Miles
Affiliation:
Department of Microbiology, Medical School, University of Otago, Dunedin, New Zealand
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Summary

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The findings of a survey on the ecology of an alphavirus over the years 1964–9 are reviewed. Evidence is presented to show that wild birds constitute a vertebrate reservoir of the virus and that mosquitoes, primarily Culiseta tonnoiri and Culex pervigilans, which are both endemic New Zealand species, are responsible for summer transmission.

Serological evidence of infection was obtained in all years and evidence is presented to indicate that the virus is enzootic rather than being reintroduced each spring. The number of birds with antibody increased before mosquitoes became active in the spring and possible explanations of this are discussed.

The mean temperature in the hottest month in the study area is substantially below that in other areas with enzootic mosquito-borne viruses and experimental studies showed that Whataroa virus was able to replicate more rapidly in mosquitoes at low temperatures than any arboviruses previously studied.

The main natural focus of infection appeared to be in a modified habitat and the introduced song thrush (Turdus philomelos) to be the main vertebrate reservoir host.

Type
Research Article
Information
Journal of Hygiene , Volume 71 , Issue 4 , December 1973 , pp. 701 - 713
Copyright
Copyright © Cambridge University Press 1973

References

REFERENCES

Austin, F. J. (1967). The arbovirus vector potential of a simuliid. Annals of Tropical Medicine and Parasitology 61, 189–99.CrossRefGoogle ScholarPubMed
Chamblerain, R. W. & Sudia, W. D. (1955). The effects of temperature upon the extrinsic incubation of Eastern equine encephalitis in mosquitoes. American Journal of Hygiene 62, 295–305.Google Scholar
Dempster, A. G. (1964). Trichosurus vulpecula and Rattus norvegicus in the epidemiology of two arboviruses. B.Med.Sci. Thesis, University of Otago.Google Scholar
Hess, A. D., Cherubin, C. E. & La Motte, L. C. (1963). Relation of temperature to activity of Western and St Louis encephalitis viruses. American Journal of Tropical Medicine and Hygiene 12, 657–67.CrossRefGoogle Scholar
Huang, C. H. (1957). Studies of virus factors as causes of inapparent infection in Japanese B encephalitis: virus strains, viraemia, stability to heat and infective dosage. Acta Virologica 1, 36–45.Google ScholarPubMed
McIntosh, B. M., McGillivray, G. M., Dickinson, D. B. & Taljaard, J. J. (1968). Ecological studies on Sindbis and West Nile viruses in South Africa. IV. Infection in a wild avian population. South African Journal of Medical Science 33, 105–12.Google Scholar
McIntosh, B. M., Dickinson, D. B. & McGillivray, G. M. (1969). Ecological studies on Sindbis and West Nile viruses in South Africa. V. The response of birds to inoculation of virus. South African Journal of Medical Science 34, 77–82.Google ScholarPubMed
McIntosh, B. M., Madsen, W. & Dickinson, D. B. (1969). Ecological studies on Sindbis and West Nile viruses in South Africa. VI. The antibody response of wild birds. South African Journal of Medical Science 34, 83–91.Google ScholarPubMed
Maguire, T. & Miles, J. A. R. (1960). Evidence of infection with arthropod-borne viruses in New Zealand. Proceedings of the University of Otago Medical School 38, 25–7.Google Scholar
Maguire, T., Miles, J. A. R. & Casals, J. (1967). Whataroa virus, a group A arbovirus isolated in South Westland, New Zealand. American Journal of Tropical Medicine and Hygiene 16, 371–3.CrossRefGoogle Scholar
Miles, J. A. R., Pillai, J. S. & Maguire, T. (1973). The multiplication of Whataroa virus in mosquitoes. Journal of Medical Entomology.CrossRefGoogle ScholarPubMed
Miles, J. A. R., Ross, R. W., Austin, F. J., Maguire, T., Macnamara, F. N. & Ross, Lesley M. (1971). Infection of wild birds with Whataroa virus in South Westland, New Zealand. Australian Journal of Experimental Biology and Medical Science 49, 365–76.CrossRefGoogle ScholarPubMed
Reeves, W. C., & Hammon, W. McD. (1962). In Epidemiology of the Arthropod-borne Viral Encephalitides in Kern County, California 1943–52, p. 223. University of California, Berkeley.Google Scholar
Ross, R. W. (1971). The survival of Whataroa virus in New Zealand ticks, Ornithodoros capensis (Neumann) Argasidae: Acarinae. Proceedings of the University of Otago Medical School 49, 38–40.Google Scholar
Ross, R. W., Miles, J. A. R., Austin, F. J. & Maguire, T. (1964). Investigations into the ecology of a group A arbovirus in Westland, New Zealand. Australian Journal of Experimental Biology and Medical Science 42, 689–702.CrossRefGoogle ScholarPubMed
Scherer, W. F., Hardy, J. L., Gresser, I. & McClure, H. E. (1964). Arbovirus neutralising substances in avian plasmas. I. Their higher prevalences after collection of birds by shooting and cardiac puncture than after netting and venipuncture. American Journal of Tropical Medicine and Hygiene 13, 859–66.CrossRefGoogle ScholarPubMed
Stamm, D. D. (1963). Susceptibility of bird populations to Eastern, Western and St Louis encephalitis viruses. Proceedings 13th International Ornithological Congress 1, 591–603.Google Scholar
Stamm, D. D. (1968). Arbovirus studies in birds in South Alabama. American Journal of Epidemiology 87, 127–37.CrossRefGoogle ScholarPubMed