Low viral persistence of an immunological model

Suqi Ma

doi:10.3934/mbe.2012.9.809

Article Contents

2012, Volume 9, Issue 4: 809-817. Doi: 10.3934/mbe.2012.9.809

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Low viral persistence of an immunological model

Suqi Ma^1,

1.
Department of Mathematics, China Agricultural University, Beijing 100083

Received: June 30, 2011

Revised: April 30, 2012

Published: September 2012

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Abstract

Hepatitis B virus can persist at very low levels in the body in the face of host immunity, and reactive during immunosuppression and sustain the immunological memory to lead to the possible state of 'infection immunity'. To analyze this phenomena quantitatively, a mathematical model which is described by DDEs with relative to cytotoxic T lymphocyte (CTL) response to Hepatitis B virus is used. Using the knowledge of DDEs and the numerical bifurcation analysis techniques, the dynamical behavior of Hopf bifurcation which may lead to the periodic oscillation of populations is analyzed. Domains of low level viral persistence which is possible, either as a stable equilibrium or a stable oscillatory pattern, are identified in parameter space. The virus replication rate appears to have influence to the amplitude of the persisting oscillatory population densities.

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Mathematics Subject Classification: Primary: 34K20, 92C50; Secondary: 92D25.

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