title: Core recruitment effects in SIS models with constant total populations.
abstract: We consider a set of SIS models for a heterosexually transmitted disease in which there is recruitment between core and non-core subpopulations as a function of prevalence of the disease. Behavior diverges from the traditional R0 threshold behavior and yields an extra pair of endemic equilibria in one case and a limit cycle in the other. Total at-risk population is constant.
authors.affiliation: Department of Mathematics, University of Texas at Arlington 76019-0408, USA. kribs@math.uta.edu
authors.forename: C M
authors.initials: CM
authors.lastname: Kribs-Zaleta
mesh_terms: D005260:Female; D020010:Heterosexuality; D006801:Humans; D008297:Male; D008954:Models, Biological; D009716:Numerical Analysis, Computer-Assisted; D010949:Plasma; D015995:Prevalence; D012307:Risk Factors; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000453:epidemiology* / Q000517:prevention & control