This paper considers the optimal control of tuberculosis through education, diagnosis campaign
and chemoprophylaxis of latently infected. A mathematical model which includes
important components such as undiagnosed infectious, diagnosed infectious, latently
infected and lost-sight infectious is formulated. The model combines a frequency dependent
and a density dependent force of infection for TB transmission. Through optimal
control theory and numerical simulations, a cost-effective balance of two different intervention
methods is obtained. Seeking to minimize the amount of money the government
spends when tuberculosis remain endemic in the Cameroonian population, Pontryagin’s
maximum principle is used to characterize the optimal control. The optimality system is
derived and solved numerically using the forward–backward sweep method (FBSM).
Results provide a framework for designing cost-effective strategies for diseases with multiple
intervention methods. It comes out that combining chemoprophylaxis and education,
the burden of TB can be reduced by 80% in 10 years.
This paper considers the optimal control of tuberculosis through education, diagnosis campaignand chemoprophylaxis of latently infected. A mathematical model which includesimportant components such as undiagnosed infectious, diagnosed infectious, latentlyinfected and lost-sight infectious is formulated. The model combines a frequency dependentand a density dependent force of infection for TB transmission. Through optimalcontrol theory and numerical simulations, a cost-effective balance of two different interventionmethods is obtained. Seeking to minimize the amount of money the governmentspends when tuberculosis remain endemic in the Cameroonian population, Pontryagin’smaximum principle is used to characterize the optimal control. The optimality system isderived and solved numerically using the forward–backward sweep method (FBSM).Results provide a framework for designing cost-effective strategies for diseases with multipleintervention methods. It comes out that combining chemoprophylaxis and education,the burden of TB can be reduced by 80% in 10 years.
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