title: Global properties of vector-host disease models with time delays.
abstract: Since there exist extrinsic and intrinsic incubation periods of pathogens in the feedback interactions between the vectors and hosts, it is necessary to consider the incubation delays in vector-host disease transmission dynamics. In this paper, we propose vector-host disease models with two time delays, one describing the incubation period in the vector population and another representing the incubation period in the host population. Both distributed and discrete delays are used. By constructing suitable Liapunov functions, we obtain sufficient conditions for the global stability of the endemic equilibria of these models. The analytic results reveal that the global dynamics of such vector-host disease models with time delays are completely determined by the basic reproduction number. Some specific cases with discrete delay are studied and the corresponding results are improved.
authors.affiliation: Department of Mathematics, Xinyang Normal University, Xinyang, 464000, People's Republic of China.
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Cai
authors.affiliation: Department of Mathematics, Xinyang Normal University, Xinyang, 464000, People's Republic of China.
authors.forename: Xue-Zhi
authors.initials: XZ
authors.lastname: Li
authors.affiliation: Department of Mathematics, Xinyang Normal University, Xinyang, 464000, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Fang
authors.affiliation: Department of Mathematics, University of Miami, Coral Gables, FL, 33146, USA. ruan@math.miami.edu.
authors.forename: Shigui
authors.initials: S
authors.lastname: Ruan
mesh_terms: D000818:Animals; D050936:Basic Reproduction Number; D003198:Computer Simulation; D018562:Disease Transmission, Infectious / Q000706:statistics & numerical data; D004199:Disease Vectors; D054884:Host-Pathogen Interactions; D006801:Humans; D055641:Mathematical Concepts; D008954:Models, Biological; D013997:Time Factors
keywords: Basic reproduction number; Global stability; Liapunov functional; Time delay; Vector–host disease model