  TThis paper presents the dynamics of mosquitoes and humans, with general
nonlinear incidence rate and multiple distributed delays for the disease. The
model is a SEIRS system of delay differential equations. The normalized
dimensionless version is derived; analytical techniques are applied to find
conditions for deterministic extinction and permanence of disease. The BRN
$R^{*}_{0}$ and ESPR $E(e^{-(\mu_{v}T_{1}+\mu T_{2})})$ are computed.
Conditions for deterministic extinction and permanence are expressed in terms
of $R^{*}_{0}$ and $E(e^{-(\mu_{v}T_{1}+\mu T_{2})})$, and applied to a P.vivax
malaria scenario. Numerical results are given.
