Open AccessANALYSIS OF THE TRANSMISSION DYNAMICS FOR ZIKA VIRUS WITH NONLINEAR FORCE OF INFECTIONS
Author(s) -
Eze Frankline Chidi,
Nwadibia Anthony Ifeanyi.,
Inyama Simeon Chioma,
Andrew Omame,
Godwin Emeka Chigaemezu
Publication year - 2020
Publication title -
journal of mathematical sciences and computational mathematics
Language(s) - English
Resource type - Journals
eISSN - 2688-8300
pISSN - 2644-3368
DOI - 10.15864/jmscm.1201
Subject(s) - basic reproduction number , lyapunov function , mathematics , epidemic model , population , stability theory , invariant (physics) , nonlinear system , transmission (telecommunications) , ordinary differential equation , stability (learning theory) , mathematical analysis , differential equation , physics , mathematical physics , computer science , demography , quantum mechanics , machine learning , telecommunications , sociology
This paper presents a seven-dimensional ordinary differential equation of mathematical model of zika virus between humans and mosquitoes population with non-linear forces of infection in form of saturated incidence rate. Vertical transmission is introduced into the model. These incidence rates produce antibodies in response to the presence of parasite-causing zika virus in both human and mosquito populations. The existence of region where the model is epidemiologically feasible is established (invariant set) and the positivity of the models is also established. The basic properties of the model are determined including the reproduction number of both cases, R 0 and R 0 | p=q=0 R respectively. Stability analysis of the disease-free equilibrium is investigated via the threshold parameter (reproduction number R 0 | p=q=0 ) obtained using the next generation matrix technique. The special case model results shown that the disease-free equilibrium is locally asymptotical stable at threshold parameter less than unity and unstable at threshold parameter greater than unity. Under specific conditions on the model parameters, the global dynamics of the special case model around the equilibra are explored using Lyapunov functions. For a threshold parameter less than unity, the disease-free equilibrium is globally asymptotically stable. While the endemic equilibrium is shows to be globally asymptotically stable at threshold parameter greater than unity. Numerical simulations are carried out to confirm the analytic results and explore the possible behavior of the formulated model. The result shows that, horizontal and vertical transmission contributes a higher percentage of infected individuals in the population than only horizontal transmission.