TITLE:
Modelling the Optimal Control of Transmission Dynamics of Mycobacterium ulceran Infection
AUTHORS:
Magreth Anga Kimaro, Estomih S. Massawe, Daniel Oluwole Makinde
KEYWORDS:
MU, Optimal Control, Stability, Pontryagin’s Maximum Principle, Reproduction Number
JOURNAL NAME:
Open Journal of Epidemiology,
Vol.5 No.4,
November
9,
2015
ABSTRACT: This paper examines optimal control of transmission dynamics of Mycobacterium ulceran (MU) infection. A nonlinear mathematical model for the problem is proposed and analysed qualitatively using the stability theory of the differential equations, optimal control and computer simulation. The basic reproduction number of the reduced model system is obtained by using the next generation operator method. It is found that by using Ruth Hurwitz criteria, the disease free equilibrium point is locally asymptotically stable and using centre manifold theory, the model shows the transcritical (forward) bifurcation. Optimal control is applied to the model seeking to minimize the transmission dynamics of MU infection on human and water-bugs. Pontryagin’s maximum principle is used to characterize the optimal levels of the controls. The results of optimality are solved numerically using MATLAB software and the results show that optimal combination of two controls (environmental and health education for prevention) and (water and environmental purification) minimizes the MU infection in the population.