Berlin 2018 – wissenschaftliches Programm
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SOE: Fachverband Physik sozio-ökonomischer Systeme
SOE 18: Complex Contagion Phenomena I (Focus Session with EPS-SNPD) (joint session SOE/DY/BP)
SOE 18.7: Vortrag
Donnerstag, 15. März 2018, 12:30–12:45, MA 001
How to compete in a multi-pathogen system? — Francesco Pinotti1, •Fakhteh Ghanbarnejad2, Philipp Hövel2, and Chiara Poletto1 — 1Sorbonne Universités, UPMC, INSERM, IPLESP UMRS 1136, Paris, France — 2Institute of Theoretical Physics, TU Berlin, Berlin, Germany
In an ecological system pathogens often need to share their host with other pathogens, and therefore compete for the resources with different spreading strategies. Both cooperative and competitive interactions in bacterial infections have been observed. These two mechanisms have been studied separately in the majority of cases and non-trivial dynamical effects can be expected to arise from their combination. In this work, we study two strains competing with each other for host resources in the presence of a third pathogen cooperating with both of them. We first treat dynamics in a homogeneously mixed population by means of mean-field theory and stability analysis. We study the impact of cooperation on the outcome of the two-pathogen competition, which can be quantified in terms of dominance of one competing pathogen or the co-circulation of both of them. We show that the presence of a third cooperating pathogen can alter the outcome of competition as it may favor the more cooperative pathogen over the more infectious one. We then consider more complex contact structures among hosts and perform computer simulations to study the evolution of the diseases.