Impact of simultaneous exposure to arboviruses on infection and transmission by Aedes aegypti mosquitoes

Claudia Rückert, James Weger-Lucarelli, Selene M. Garcia-Luna, Michael C. Young, Alex D. Byas, Reyes A. Murrieta, Joseph R. Fauver and Gregory D. Ebel ()
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Claudia Rückert: Immunology, and Pathology, Colorado State University
James Weger-Lucarelli: Immunology, and Pathology, Colorado State University
Selene M. Garcia-Luna: Immunology, and Pathology, Colorado State University
Michael C. Young: Immunology, and Pathology, Colorado State University
Alex D. Byas: Immunology, and Pathology, Colorado State University
Reyes A. Murrieta: Immunology, and Pathology, Colorado State University
Joseph R. Fauver: Immunology, and Pathology, Colorado State University
Gregory D. Ebel: Immunology, and Pathology, Colorado State University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract The recent emergence of both chikungunya and Zika viruses in the Americas has significantly expanded their distribution and has thus increased the possibility that individuals may become infected by more than one Aedes aegypti-borne virus at a time. Recent clinical data support an increase in the frequency of coinfection in human patients, raising the likelihood that mosquitoes could be exposed to multiple arboviruses during one feeding episode. The impact of coinfection on the ability of relevant vector species to transmit any of these viruses (that is, their vector competence) has not been determined. Thus, we here expose Ae. aegypti mosquitoes to chikungunya, dengue-2 or Zika viruses, both individually and as double and triple infections. Our results show that these mosquitoes can be infected with and can transmit all combinations of these viruses simultaneously. Importantly, infection, dissemination and transmission rates in mosquitoes are only mildly affected by coinfection.

Date: 2017
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DOI: 10.1038/ncomms15412

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