Quorum sensing;
Immunity;
Periodic solution;
Stability;
Subharmonic bifurcation;
Perturbation;
D O I:
10.1016/j.camwa.2008.09.019
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
Based on [J. Zhang, M. Cerasuolo, P. Fergola, Z.E. Ma, On the influence of quorum sensing in the competition between bacteria and immune system (in press)], a bacteria-immunity model with periodically bacterial quorum sensing is formulated which describes the competition between bacteria and immune cells. A discrete delay is introduced to characterize the time in which bacteria receive signal molecules and combat with immune cells. In this paper, we focus on a subsystem of the bacteria-immunity model, investigate the existence and stability of the positively periodic solution, and discuss the existence of subharmonic bifurcation by the perturbation method. (C) 2008 Elsevier Ltd. All rights reserved.