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Cache Valley virus: isolations from mosquitoes in Saskatchewan, 1972-1974
Canadian Journal of Microbiology
|June 1, 1979
Summary
Cache Valley virus (Bunyaviridae) was detected in Saskatchewan mosquitoes between 1972-1974. The findings indicate prairie grasslands are enzootic for this virus, with highest rates in Culiseta inornata.
Area of Science:
- Arbovirology
- Medical Entomology
- Viral Ecology
Background:
- Cache Valley virus (CVV) is an arbovirus of the Bunyaviridae family.
- Understanding the geographic distribution and vector dynamics of CVV is crucial for public health.
- Previous studies have indicated the presence of Bunyaviridae in Canadian mosquito populations.
Purpose of the Study:
- To determine the presence and distribution of Cache Valley virus in Saskatchewan.
- To identify potential mosquito vectors of CVV in the region.
- To assess the enzootic status of CVV in Canadian prairie grasslands.
Main Methods:
- Mosquitoes were collected in Saskatchewan from 1972 to 1974.
- A total of 113,694 individual mosquitoes were processed for virus isolation.
- Virus identification was performed using established virological techniques.
Main Results:
- Eighteen isolations of Cache Valley virus were confirmed.
- The majority of isolations occurred in August.
- Culiseta inornata exhibited the highest minimum vector infection rate (0.83/1000), followed by Culex tarsalis and Aedes vexans.
Conclusions:
- Cache Valley virus is enzootic in the prairie grasslands of Saskatchewan.
- Culiseta inornata is a significant potential vector for CVV in this region.
- The data highlights the importance of ongoing arbovirus surveillance in Canada.