Dispersal, disease and life-history evolution.
Discrete-time susceptible-infective-susceptible (S-I-S) disease transmission models can exhibit bistability (alternative stable equilibria) over a wide range of parameter values. We illustrate the richness generated by such 'simple' non-linear systems in the study of two patch epidemic models with disease-enhanced or disease-suppressed dispersal. Dispersal between patches can have a profound impact on local patch disease dynamics. In fact, dispersal between patches may give rise to bistability in parameter regimes without bistability in single patch models.
Castillo-Chavez
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Theoretical and Applied Mechanics Department, Cornell University, Ithaca, New York 14853-7801, USA.
Yakubu
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D000818:Animals; D018562:Disease Transmission, Infectious; D004812:Epidemiologic Methods; D006801:Humans; D008954:Models, Biological