关键词: 登革热, 对流, 基本再生数, 全局阈值动力学

Abstract: We established a Dengue fever transmission model that considered spatial heterogeneity and the advective effect of wind by using the theories of monotonic homogeneity and  chain transitive sets. The results  show that the basic reproduction number R₀ determines the global threshold dynamics of the model: when R₀≤1, the disease goes extinct;  when R₀, the disease persists. Numerical analysis results show  that R₀ varies non-monotonically with the advection rate, and  increasing the density of alternative hosts is helpful for disease prevention and control.

Key words: Dengue fever, advection, basic reproduction number, global threshold dynamics