Dense residential areas promote gene flow in dengue vector mosquito .

is a successful disease vector due to its ability to survive in a wide range of habitats. Despite its ubiquity and impact on public health, little is known about its differential gene flow capabilities across different city habitats. We obtained a comprehensive dataset of >27,000 genome-wide DNA markers across 105 wild-caught individuals from Singapore, a dengue-endemic tropical city with heterogeneous landscapes from densely populated urban areas to forests. Despite Singapore's challenging small-scale heterogeneity, our landscape-genomic approach indicated that dense urban areas are characterized by higher gene flow rates than managed parks and forests. We documented the incidence of infections of involving two strains (AlbA and AlbB). Our results dispel the misconception that substantial dispersal of is limited to urban greenery, with wide implications for vector management and critical insights into urban planning strategies to combat dengue transmission.