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    Mosquito and virus surveillance as a predictor of human ross river virus infection in south-west Western Australia: How useful is it?

    Access Status
    Fulltext not available
    Authors
    Walker, L.
    Selvey, Linda
    Jardine, A.
    Johansen, C.
    Lindsay, M.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Abstract

    Copyright © 2018 by The American Society of Tropical Medicine and Hygiene. Mosquito and virus surveillance systems are widely used in Western Australia (WA) to support public health efforts to reduce mosquito-borne disease. However, these programs are costly to maintain on a long-term basis. Therefore, we aimed to assess the validity of mosquito numbers and Ross River virus (RRV) isolates from surveillance trap sites as predictors of human RRV cases in south-west WA between 2003 and 2014. Using negative binomial regression modeling, mosquito surveillance was found to be a useful tool for predicting human RRV cases. In eight of the nine traps, when adjusted for season, there was an increased risk of RRV cases associated with elevated mosquito numbers detected 1 month before the onset of human cases for at least one quartile compared with the reference group. The most predictive urban trap sites were located near saltmarsh mosquito habitat, bushland that could sustain macropods and densely populated residential suburbs. This convergence of environments could allow enzootic transmission of RRV to spillover and infect the human population. Close proximity of urban trap sites to each other suggested these sites could be reduced. Ross River virus isolates were infrequent at some trap sites, so ceasing RRV isolation from mosquitoes at these sites or where isolates were not predictive of human cases could be considered. In future, trap sites could be reduced for routine surveillance, allowing other environments to be monitored to broaden the understanding of RRV ecology in the region. A more cost-effective and efficient surveillance program may result from these modifications.

    Citation
    Walker, L. and Selvey, L. and Jardine, A. and Johansen, C. and Lindsay, M. 2018. Mosquito and virus surveillance as a predictor of human ross river virus infection in south-west Western Australia: How useful is it?. The American Society of Tropical Medicine and Hygiene. 99 (4): pp. 1066-1073.
    Source Title
    The American Society of Tropical Medicine and Hygiene
    DOI
    10.4269/ajtmh.18-0459
    ISSN
    0002-9637
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/72933
    Collection
    • Curtin Research Publications

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