Vector Competence to Zika Virus Changes Depending on the Manaus's Region Origin of the Aedes aegypti: A Study of an Endemic Brazilian Amazonian City

Andréia da Costa Paz; Bárbara Aparecida Chaves; Raquel Soares Maia Godoy; Deilane Ferreira Coelho; Ademir Bentes Vieira  Júnior; Rodrigo Maciel Alencar; João Arthur Alcântara; Luiza dos Santos Felix; Cinthia Catharina Azevedo Oliveira; Wuelton Marcelo Monteiro; Marcus Vinicius Guimarães Lacerda; Nágila Francinete Costa Secundino; Paulo Filemon Paolucci Pimenta

doi:10.20944/preprints202212.0384.v1

Preprint Brief Report Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 8 December 2022 / Approved: 21 December 2022 / Online: 21 December 2022 (04:12:17 CET)

Zika virus (ZIKV) is transmitted to humans by the infectious bite of mosquitoes like Aedes aegypti. After a viremic blood meal, the virus must infect the midgut, disseminate to tissues, and reach the salivary gland to be transmitted to a vertebrate host. Many factors influence the mosquito’s ability to become infected and transmit viruses, such as the mosquito’s genetic diversity, intrinsic antiviral barriers, and midgut microbiota. This study evaluated the patterns of ZIKV infection in Ae. aegypti field populations of a city. The infection rate, disseminated infection rate, viral transmission rate, and transmission efficiency were measured by quantitative PCR at 14 days post-infection. The results showed that all Ae. aegypti populations had individuals susceptible to ZIKV infection and able to transmit the virus. The infection parameters showed the city’s geographical area of origin of the Ae. aegypti influences their vector competence for ZIKV transmission.

Zika virus; field mosquito population; vector competence; transmission efficiency; infection rate; disseminated infection rate

Biology and Life Sciences, Virology

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Vector Competence to Zika Virus Changes Depending on the Manaus's Region Origin of the Aedes aegypti: A Study of an Endemic Brazilian Amazonian City

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