中国物理B ›› 2011, Vol. 20 ›› Issue (4): 46401-046401.doi: 10.1088/1674-1056/20/4/046401

• • 上一篇    下一篇

Epidemic thresholds in a heterogenous population with competing strains

傅新楚1, 杨孟1, 吴庆初2   

  1. (1)Department of Mathematics, Shanghai University, Shanghai 200444, China; (2)Department of Mathematics, Shanghai University, Shanghai 200444, China;College of Mathematics and Information Science, Jiangxi Normal University, Nanchang 330022, China
  • 收稿日期:2010-06-23 修回日期:2010-08-04 出版日期:2011-04-15 发布日期:2011-04-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11072136) and the Shanghai Leading Academic Discipline Project, China (Grant No. S30104).

Epidemic thresholds in a heterogenous population with competing strains

Wu Qing-Chu(吴庆初)a)b)†, Fu Xin-Chu(傅新楚)a), and Yang Meng(杨孟)a)   

  1. a Department of Mathematics, Shanghai University, Shanghai 200444, China; b College of Mathematics and Information Science, Jiangxi Normal University, Nanchang 330022, China
  • Received:2010-06-23 Revised:2010-08-04 Online:2011-04-15 Published:2011-04-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11072136) and the Shanghai Leading Academic Discipline Project, China (Grant No. S30104).

摘要: Among many epidemic models, one epidemic disease may transmit with the existence of other pathogens or other strains from the same pathogen. In this paper, we consider the case where all of the strains obey the susceptible-infected-susceptible mechanism and compete with each other at the expense of common susceptible individuals. By using the heterogenous mean-field approach, we discuss the epidemic threshold for one of two strains. We confirm the existence of epidemic threshold in both finite and infinite populations subject to underlying epidemic transmission. Simulations in the Barabasi-Albert (BA) scale-free networks are in good agreement with the analytical results.

关键词: complex network, epidemic threshold, epidemic dynamics

Abstract: Among many epidemic models, one epidemic disease may transmit with the existence of other pathogens or other strains from the same pathogen. In this paper, we consider the case where all of the strains obey the susceptible-infected-susceptible mechanism and compete with each other at the expense of common susceptible individuals. By using the heterogenous mean-field approach, we discuss the epidemic threshold for one of two strains. We confirm the existence of epidemic threshold in both finite and infinite populations subject to underlying epidemic transmission. Simulations in the Barabasi-Albert (BA) scale-free networks are in good agreement with the analytical results.

Key words: complex network, epidemic threshold, epidemic dynamics

中图分类号:  (Networks)

  • 64.60.aq
64.60.De (Statistical mechanics of model systems (Ising model, Potts model, field-theory models, Monte Carlo techniques, etc.)) 87.10.Ed (Ordinary differential equations (ODE), partial differential equations (PDE), integrodifferential models)