Analysis of a time-delayed vector-host epidemic model with nonlinear incidences

Volume 38, Issue 4, pp 502--520 https://dx.doi.org/10.22436/jmcs.038.04.06
Publication Date: February 11, 2025 Submission Date: August 06, 2024 Revision Date: November 11, 2024 Accteptance Date: January 08, 2025

Authors

S. Jothika - Department of Mathematics, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Tamil Nadu, India. M. Radhakrishnan - Department of Mathematics, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Tamil Nadu, India. - Directorate of Learning and Development, SRM Institute of Science and Technology, Kattankulathur, 603203, Tamil Nadu, India.


Abstract

In this study, we investigate a time-delayed vector-host epidemic model with nonlinear incidence rates to gain a deeper understanding of the dynamics of vector-borne diseases, particularly those transmitted by vectors like mosquitoes. The model incorporates a constant human recruitment rate, exponential natural death, and an asymptotically constant vector population. We rigorously analyze the stability of both the disease-free and endemic equilibria, introducing a threshold parameter, the basic reproduction number \(R_0\), to determine the long-term behavior of the epidemic. For \(R_0<1\), the disease-free equilibrium is globally asymptotically stable, indicating disease eradication. When \(R_0>1\), the endemic equilibrium emerges, and its stability is assessed through local stability analysis. The impact of time delay on the system dynamics is examined, revealing conditions under which a Hopf bifurcation occurs, leading to sustained periodic oscillations. This phenomenon highlights the critical role of time delay in influencing the epidemiology and control of vector-borne diseases. Our findings provide valuable insights into the complex interplay between time delays and nonlinear transmission dynamics, offering implications for effective disease management and control strategies.


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ISRP Style

S. Jothika, M. Radhakrishnan, Analysis of a time-delayed vector-host epidemic model with nonlinear incidences, Journal of Mathematics and Computer Science, 38 (2025), no. 4, 502--520

AMA Style

Jothika S., Radhakrishnan M., Analysis of a time-delayed vector-host epidemic model with nonlinear incidences. J Math Comput SCI-JM. (2025); 38(4):502--520

Chicago/Turabian Style

Jothika, S., Radhakrishnan, M.. "Analysis of a time-delayed vector-host epidemic model with nonlinear incidences." Journal of Mathematics and Computer Science, 38, no. 4 (2025): 502--520


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