Analysis of an Age-structured SIL model with demographics process and vertical transmission

Ramses Djidjou Demasse 1 Jean Jules Tewa 2 Samuel Bowong 3, 4
1 Department of Mathematics [Yaoundé]
2 ENSP - Ecole Nationale Supérieure Polytechnique [Yaoundé]
3 LIRIMA - Laboratoire International de Recherche en Informatique et Mathématiques Appliquées
4 Faculté des Sciences [Douala]
Résumé : We consider a mathematical SIL model for the spread of a directly transmitted infectious disease in an age-structured population; taking into account the demographic process and the vertical transmission of the disease. First we establish the mathematical well-posedness of the time evolution problem by using the semigroup approach. Next we prove that the basic reproduction ratio R0 is given as the spectral radius of a positive operator, and an endemic state exist if and only if the basic reproduction ratio R0 is greater than unity, while the disease-free equilibrium is locally asymptotically stable if R0<1. We also show that the endemic steady states are forwardly bifurcated from the disease-free steady state when R0 cross the unity. Finally we examine the conditions for the local stability of the endemic steady states.
Keywords : Age-structured model Semigroup Basic reproduction ratio Stability.
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Article dans une revue
Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées, INRIA, 2014, 17, pp.23-52
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Ramses Djidjou Demasse, Jean Jules Tewa, Samuel Bowong. Analysis of an Age-structured SIL model with demographics process and vertical transmission. Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées, INRIA, 2014, 17, pp.23-52. 〈hal-01300058〉

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