Abstract
An HIV/AIDS treatment model with a nonlinear incidence is formulated. The infectious period is partitioned into
the asymptotic and the symptomatic phases according to clinical stages. The constant recruitment rate, disease-induced
death, drug therapies, as well as a nonlinear incidence, are incorporated into the model. The basic reproduction number
R0
of the model is determined by the method of next generation matrix. Mathematical analysis establishes that the glo-bal dynamics of the spread of the HIV infectious disease are completely determined by the basic reproduction number
R0
.IfR0 6 1, the disease always dies out and the disease-free equilibrium is globally stable. If R0 > 1, the disease per-sists and the unique endemic equilibrium is globally asymptotically stable in the interior of the feasible region.
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