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Searched keyword : Aedes albopictus (Tiger mosquito)
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Yellow fever virus (YFV), a Flavivirus transmitted by mosquitoes causes a severe hemorrhagic fever in humans. Despite the availability of a safe and effective vaccine (17D), YFV is still a public health problem in tropical Africa and South America. In the Americas, the massive campaign of mosquito control during the first half of the 20th century led to the eradication of Aedes aegypti from most American countries, and as a consequence, urban outbreaks of YF were no longer observed. However, the relaxation of vector control led to the reinfestation of urban areas by Ae. aegypti and the subsequent establishment of the Asian tiger mosquito Aedes albopictus. In Brazil, while human cases are sporadically detected in the Amazonian basin where sylvatic YFV strains circulate between non-human primates and arboreal canopy-dwelling mosquitoes (Haemagogus sp.), they are increasingly reported outside the jungle moving towards the Atlantic coast, the most populated area. In the absence of routine immunization programs, YF may come back in the American towns as it was in the past. The causes leading to the current YF resurgence are multifactorial. From a mosquito vector viewpoint, changes in vector densities, distribution, vector competence or vector as a site of selection for epidemic YFV strains, can be regarded as critical factors. Our project aims to address the contribution of the invasive mosquito Ae. albopictus as a missing link to allow a selvatic YF strain (1D) to become adapted for a transmission in urban areas by the human-biting mosquito, Ae. aegypti. It will be done through three specific objectives: (i) identify Ae. albopictus-adaptive mutations after serial cycling of the selvatic YFV-1D on Brazilian Ae. albopictus mosquitoes, (ii) evaluate their potential to be transmitted to a vertebrate host, and (iii) deepen the transmission of the experimentally selected viruses by field-collected mosquito populations.
Assessing the integrations of viral sequences into the genomes of Aedes albopictus and Aedes aegypti
Aedes albopictus is an important vector for transmitting arboviruses, such as Dengue, Chikungunya, West Nile or Zika viruses. Its worldwide distribution due to its high ability to adapt to variable en
As a result of combined climate change and globalization (increased flow of travelers and goods), the distribution of the mosquito Aedes albopictus is expanding significantly outside tropical regions.