title: Analysis of an SEIR epidemic model with saturated incidence and saturated treatment function.
abstract: The dynamics of SEIR epidemic model with saturated incidence rate and saturated treatment function are explored in this paper. The basic reproduction number that determines disease extinction and disease survival is given. The existing threshold conditions of all kinds of the equilibrium points are obtained. Sufficient conditions are established for the existence of backward bifurcation. The local asymptotical stability of equilibrium is verified by analyzing the eigenvalues and using the Routh-Hurwitz criterion. We also discuss the global asymptotical stability of the endemic equilibrium by autonomous convergence theorem. The study indicates that we should improve the efficiency and enlarge the capacity of the treatment to control the spread of disease. Numerical simulations are presented to support and complement the theoretical findings.
authors.affiliation: School of Mathematics and Computer Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Jinhong
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Mathematics and Computer Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Jianwen
authors.initials: J
authors.lastname: Jia
authors.affiliation: Department of Mathematics, Xinyang Normal University, Xinyang, Henan 464000, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Song
mesh_terms: D000465:Algorithms; D003141:Communicable Diseases / Q000453:epidemiology*; D058872:Epidemics; D006801:Humans; D015994:Incidence; D008962:Models, Theoretical