<prompt> The principal vector of dengue virus-Anopheles culicifaciesAedes aegyptiAnopheles stephensiCulex molestus  <response>: The principal vector of dengue is the mosquito Aedes aegypti, which breeds in standing water; collections of water in containers, water based air coolers tyre drumps are a god environment for the vector in large cities. Reference: Harrison20th edition pg 879 