Hamelin Frédéric, Hilker Frank M., Dumont Yves.
2023. Impact of conditional vector preferences in the spatial spread of infectious diseases.
. University of Pretoria
![[img]](http://agritrop.cirad.fr/style/images/fileicons/text.png) |
Version publiée
- Anglais
Accès réservé aux personnels Cirad Utilisation soumise à autorisation de l'auteur ou du Cirad. Abstract_SAMSA_Nov_2023_Dumont.pdf Télécharger (93kB) | Demander une copie |
Résumé : Despite the fact that it is well known that vectors do not visit hosts randomly, many epidemiological models of vector-borne diseases do not take into account this biological fact. Indeed, vectors may be differentially attracted toward infected and uninfected hosts depending on whether they carry the pathogen or not. We would like to know what would be the implication for the long-term dynamics of our system. This talk is based on publication. We consider a system of partial differential equations with vector diffusion. For the nonspa tial model, we show that conditional vector preferences may induce bi-stability between the disease-free equilibrium and an endemic equilibrium. Backward bifurcation may also occur. For the model with diffusion, we show that bistable travelling waves may exists with posiAve or negative spreading speeds such that the disease either invades or retreats into space. When a monostable travelling wave occurs, we show that the disease spreading speed depends on conditional vectorial preferences. We illustrate the theoretical results with several simulations. We also discuss the implication of our findings in terms of control strategies.
Mots-clés libres : Vector control, Vector bias, Mathematical modelling, Backward bifurcation, Travelling wave, Spreading speed, Front reversal, Pushed and pulled waves
Agences de financement hors UE : University of Pretoria
Auteurs et affiliations
- Hamelin Frédéric, INRAE (FRA)
- Hilker Frank M., Osnabruck University (DEU)
-
Dumont Yves, CIRAD-BIOS-UMR AMAP (REU)
ORCID: 0000-0003-4817-685X
Source : Cirad-Agritrop (https://agritrop.cirad.fr/607450/)
[ Page générée et mise en cache le 2024-03-02 ]
