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On the Origin of Complex Dynamics in Multi-strain Models: Insights for Public Health Intervention Measures

Projektbeschreibung

Eine neue Generation epidemiologischer Modelle

Um biologische Fragen in echten Systemen zu klären – wie beispielsweise Infektionskrankheiten in realen Umgebungen –, wird oft auf Mathematik zurückgegriffen. Epidemiologische Modelle extrahieren aus empirischen Daten Informationen über das Wechselspiel zwischen Wirt und Krankheitserreger, doch die Komplexität eben dieser Interaktionen ist eine Herausforderung. Kernziel des EU-finanzierten Projekts COMPLEXDYNAMICS-PHIM ist die Entwicklung von Modellen, die mit einer möglichst einfachen Struktur spezifische Probleme der öffentlichen Gesundheit abbilden können. Das Forschungsteam evaluiert dazu die Rolle von Interaktionen zwischen Wirt und Krankheitserreger, die Impfdynamik und die Eindämmung von Vektorpopulationen. Insgesamt werden die Arbeiten dazu beitragen, die Mechanismen hinter der Komplexität von Infektionskrankheiten zu entschlüsseln, und somit ein zentrales Vorhersagesystem ermöglichen, das als Grundlage öffentlicher Interventionen dienen kann.

Ziel

The dynamics of infectious diseases are by nature non-linear and the understanding of such processes is mathematically difficult, demanding concepts from various fields of mathematics tackling biological questions for real life systems. To be descriptive and predictive, models try to include relevant information on the host-pathogen-vector interactions via the available empirical data. These models have shown rich dynamic structures, with bifurcations up to chaotic attractors able to describe large fluctuations observed in real world disease incidence data.

In this project, the origin of the chaotic dynamics in multi-strain epidemiological models will be studied and the mechanisms needed to generate such complex behavior will be identified in basic models, disentangling it from external forcing such as seasonality for example. Multi-strain models will be extended, in collaboration with Prof. Andrea Pugliese (Trento University) providing his experience on vector dynamics, age and space-structured epidemic modeling. The dynamics of vaccine implementation and the control of vector populations, combined with the host-pathogen interactions, will be rigorously evaluated. The over-riding aim of this project is to develop the simplest models able to address specific public health questions, taking into account the chaotic behavior found in such systems, a challenging and new approach.

The developed models will be investigated using innovative methods from dynamical systems theory and stochastic processes, including an ambitious and novel application of a recently developed technique for parameter estimation in such complex systems, a method called maximum likelihood iterated filtering including dynamic noise in likelihood functions for multi-strain dynamics. This proposal requires a highly interdisciplinary approach with results applied well beyond the state-of-the-art.

Koordinator

UNIVERSITA DEGLI STUDI DI TRENTO
Netto-EU-Beitrag
€ 180 277,20
Adresse
VIA CALEPINA 14
38122 Trento
Italien

Auf der Karte ansehen

Region
Nord-Est Provincia Autonoma di Trento Trento
Aktivitätstyp
Higher or Secondary Education Establishments
Links
Gesamtkosten
€ 180 277,20