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Risk of yellow fever virus transmission in the Asia-Pacific region
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Risk of yellow fever virus transmission in the Asia-Pacific region
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Journal Article
Risk of yellow fever virus transmission in the Asia-Pacific region
2020
Overview
Historically endemic to Sub-Saharan Africa and South America, yellow fever is absent from the Asia-Pacific region. Yellow fever virus (YFV) is mainly transmitted by the anthropophilic
Aedes
mosquitoes whose distribution encompasses a large belt of tropical and sub tropical regions. Increasing exchanges between Africa and Asia have caused imported YFV incidents in non-endemic areas, which are threatening Asia with a new viral emergence. Here, using experimental infections of field-collected mosquitoes, we show that Asian-Pacific
Aedes
mosquitoes are competent vectors for YFV. We observe that
Aedes aegypti
populations from Singapore, Taiwan, Thailand, and New Caledonia are capable of transmitting YFV 14 days after oral infections, with a number of viral particles excreted from saliva reaching up to 23,000 viral particles. These findings represent the most comprehensive assessment of vector competence and show that
Ae. aegypti
mosquitoes from the Asia-Pacific region are highly competent to YFV, corroborating that vector populations are seemingly not a brake to the emergence of yellow fever in the region.
Yellow fever is absent from the Asia/Pacific region, despite presence of the mosquito vector. Here, the authors demonstrate that mosquitoes collected from field sites across the region are capable of transmitting yellow fever virus, indicating that vector competence is not a barrier to disease spread.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ Aedes
/ Fever
/ Humanities and Social Sciences
/ Microbiology and Parasitology
/ Saliva
/ Science
/ Vectors
/ Virology
/ Viruses
