# American Institute of Mathematical Sciences

October  2013, 18(8): 1999-2017. doi: 10.3934/dcdsb.2013.18.1999

## Global analysis of age-structured within-host virus model

 1 Department of Mathematics, University of Florida, Gainesville, FL 32611-8105, United States

Received  March 2012 Revised  December 2012 Published  July 2013

A mathematical model of a within-host viral infection with explicit age-since-infection structure for infected cells is presented. A global analysis of the model is conducted. It is shown that when the basic reproductive number falls below unity, the infection dies out. On the contrary, when the basic reproductive number exceeds unity, there exists a unique positive equilibrium that attracts all positive solutions of the model. The global stability analysis combines the existence of a compact global attractor and a Lyapunov function.
Citation: Cameron J. Browne, Sergei S. Pilyugin. Global analysis of age-structured within-host virus model. Discrete & Continuous Dynamical Systems - B, 2013, 18 (8) : 1999-2017. doi: 10.3934/dcdsb.2013.18.1999
##### References:
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##### References:
 [1] R. Adams and J. Fournier, "Sobolev Spaces,'', Second edition, 140 (2003).   Google Scholar [2] C. L. Althaus, A. S. De Vos and R. J. De Boer, Reassessing the human immunodeficiency virus type 1 life cycle through age-structured modeling: life span of infected cells, viral generation time, and basic reproductive number, $R_0$,, J. Virol., 83 (2009), 7659.   Google Scholar [3] P. De Leenheer and S. S. Pilyugin, Multistrain virus dynamics with mutations: A global analysis,, Math. Med. Biol., 25 (2008), 285.   Google Scholar [4] M. A. Gilchrist, D. Coombs and A. S. Perelson, Optimizing within-host viral fitness: Infected cell lifespan and virion production rate,, J. Theor. Biol., 229 (2004), 281.  doi: 10.1016/j.jtbi.2004.04.015.  Google Scholar [5] J. K. Hale, "Asymptotic Behavior of Dissipative Systems,'', Math. Surv. Monogr., 25 (1988).   Google Scholar [6] J. K. Hale and P. Waltman, Persistence in infinite-dimensional systems,, SIAM J. Math. Anal., 20 (1989), 388.  doi: 10.1137/0520025.  Google Scholar [7] G. Huang, X. Liu and Y. Takeuchi, Lyapunov functions and global stability for age-structured HIV infection model,, SIAM J. Appl. Math., 72 (2012), 25.  doi: 10.1137/110826588.  Google Scholar [8] P. Magal, C. C. McCluskey and G. F. Webb, Lyapunov functional and global asymptotic stability for an infection-age model,, Appl. Anal., 89 (2010), 1109.  doi: 10.1080/00036810903208122.  Google Scholar [9] P. Magal and X.-Q. Zhao, Global attractors and steady states for uniformly persistent dynamical systems,, SIAM J. Math. Anal., 37 (2005), 251.  doi: 10.1137/S0036141003439173.  Google Scholar [10] P. W. Nelson, M. A. Gilchrist, D. Coombs, J. Hyman and A. S. Perelson, An age-structured model of HIV infection that allows for variations in the production rate of viral particles and the death rate of productively infected cells,, Math. Biosci. Eng., 1 (2004), 267.  doi: 10.3934/mbe.2004.1.267.  Google Scholar [11] P. W. Nelson and A. S. Perelson, Mathematical analysis of delay differential equation models of HIV-1 infection,, Math. Biosci., 179 (2002), 73.  doi: 10.1016/S0025-5564(02)00099-8.  Google Scholar [12] A. S. Perelson and P. W. Nelson, Mathematical analysis of HIV-1 dynamics in vivo,, SIAM Rev., 41 (1999), 3.  doi: 10.1137/S0036144598335107.  Google Scholar [13] L. B. Rong, Z. Feng and A. S. Perelson, Mathematical analysis of age-structured HIV-1 dynamics with combination antiretroviral therapy,, SIAM J. Appl. Math., 67 (2007), 731.  doi: 10.1137/060663945.  Google Scholar [14] H. R. Thieme, Semiflows generated by Lipschitz perturbations of non-densely defined operators,, Differential Integral Equations, 3 (1990), 1035.   Google Scholar [15] G. F. Webb, "Theory of Nonlinear Age-Dependent Population Dynamics,'', Monographs and Textbooks in Pure and Applied Mathematics, 89 (1985).   Google Scholar
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