The effect of stochastic perturbation on a nonlinear delay malaria epidemic model

The effect of stochastic perturbation on a nonlinear delay malaria epidemic model

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Article ID: iaor20121242
Volume: 82
Issue: 4
Start Page Number: 558
End Page Number: 569
Publication Date: Dec 2011
Journal: Mathematics and Computers in Simulation
Authors:
Keywords: simulation: applications
Abstract:

The subject of this paper is the stochastic epidemic malaria model with time delay, described by the system of the Itô stochastic functional delay equations. We center such a system around the endemic equilibrium state and, by the Lyapunov functional method, we obtain sufficient conditions for model parameters, as well as for time delays within which we can claim the asymptotical mean square stability and stability in probability. Finally, we present an example to show the compatibility of our mathematical results with the stochastic delay malaria model with quantities which are reliable data, as well as an example which shows that introduction of environmental noise annuls Hopf Bifurcation of the corresponding deterministic model.

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