Competitive Exclusion in a Discrete-Time Epidemic Model with Two Competing Strains
In this paper, we study a Susceptible-Infected-Susceptible (S-I-S) discrete-time model with two competing strains and distinct demographic dynamics. We use two different recruitment functions to model the population demography. Discrete models are capable of generating complex dynamics. Analytic and numerical methods are used in this study to separate the impact of demography on the epidemic process. The key issues addressed in this work are those of coexistence and/or competitive exclusion of competing strains in a population with complex dynamics. The principle of competitive exclusion is the most prevalent under the assumptions of this model.
Judith Pérez Velázquez, Fac. Ciencias, UNAM. México