Fixed points and limit cycles in the population dynamics of lysogenic viruses and their hosts

Zhenyu Wang and Nigel Goldenfeld
Phys. Rev. E 82, 011918 – Published 22 July 2010

Abstract

Starting with stochastic rate equations for the fundamental interactions between microbes and their viruses, we derive a mean-field theory for the population dynamics of microbe-virus systems, including the effects of lysogeny. In the absence of lysogeny, our model is a generalization of that proposed phenomenologically by Weitz and Dushoff. In the presence of lysogeny, we analyze the possible states of the system, identifying a limit cycle, which we interpret physically. To test the robustness of our mean-field calculations to demographic fluctuations, we have compared our results with stochastic simulations using the Gillespie algorithm. Finally, we estimate the range of parameters that delineate the various steady states of our model.

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  • Received 12 March 2010

DOI:https://doi.org/10.1103/PhysRevE.82.011918

©2010 American Physical Society

Authors & Affiliations

Zhenyu Wang and Nigel Goldenfeld

  • Loomis Laboratory of Physics, Department of Physics, University of Illinois at Urbana–Champaign, 1110 West Green Street, Urbana, Illinois 61801, USA and Institute for Genomic Biology, University of Illinois at Urbana–Champaign, 1206 West Gregory Drive, Urbana, Illinois 61801, USA

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Vol. 82, Iss. 1 — July 2010

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