The Impact of Climate and Climate Change on West Nile Virus Transmission View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2010-2016

FUNDING AMOUNT

1874696.0 USD

ABSTRACT

DESCRIPTION (provided by applicant): The long range goal of the proposed work is to understand the fundamental relationships between climate and vector-borne pathogen transmission. We will use more than a decade of research and data at multiple scales on the transmission ecology of West Nile virus (WNV) to determine mechanistic relationships of climate on mosquito populations and WNV transmission and the potential impacts of climate change. The proposed work addresses three specific aims: SA1) Determine the broad scale spatio-temporal correlations between rainfall and temperature and West Nile virus incidence in humans, mosquitoes, and birds, while controlling for land use. Use these patterns to generate mechanistic hypotheses about local scale processes generating these correlations. We will use more than a decade of WNV incidence in birds, mosquitoes, and humans to determine the influence of temperature and rainfall on the length of WNV transmission season, the spatial distribution of WNV, and the intensity of WNV transmission. SA2) Test mechanistic hypotheses about climate-transmission links with laboratory studies and local scale data on temperature, rainfall, host abundance and WNV seroprevalence, and mosquito abundance, feeding patterns, and WNV infection prevalence. We will perform laboratory studies to determine the influence of temperature on four critical factors in the transmission of vector-borne pathogens: vector competence, developmental rate, longevity, and biting rate of the three dominant WNV mosquito species. We will use local studies of WNV transmission at 182 sites in 6 regions spanning the east-west and north-south dimensions of the USA to determine the influence of rainfall and temperature on mosquito abundance and the intensity of WNV transmission relative to other factors. SA3) Use hypotheses supported from SA2 to predict the impacts of climate change on future WNV transmission. We will develop fine scale future climate projections and use the insights gained from aims 1&2 to predict the effects of climate change on the distribution of WNV in North America, the length of the WNV transmission season, and the intensity of transmission across the USA. More... »

URL

http://projectreporter.nih.gov/project_info_description.cfm?aid=8495894

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