Risk-induced backward bifurcation in HSV-2 transmission dynamics

C. N. Podder, A. B. Gumel

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A risk-structured, two-sex, model for the transmission dynamics of herpes simplex virus type 2 (HSV-2) in a population is designed and qualitatively analysed. It is shown that adding risk structure (i.e., the risk of transmitting or acquiring HSV-2 in- fection) to an HSV-2 transmission model causes the phenomenon of backward bifurcation when the associated reproduction threshold is less than unity. This dynamical feature, which has non-trivial consequence on the persistence or elimination of the disease (when the reproduction threshold is less than unity), can be removed if the susceptible male and female sub populations are not stratified according to the risk of acquiring HSV-2 infection.

Original languageEnglish (US)
Pages (from-to)377-403
Number of pages27
JournalDynamics of Continuous, Discrete and Impulsive Systems Series B: Applications and Algorithms
Issue number3
StatePublished - May 28 2012
Externally publishedYes


  • Backward bifurcation
  • Equilibria
  • HSV-2
  • Low- and high-risk groups
  • Stability

ASJC Scopus subject areas

  • Discrete Mathematics and Combinatorics
  • Applied Mathematics


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