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Scaling of Stochasticity in Dengue Hemorrhagic FeverEpidemics

Published online by Cambridge University Press:  06 June 2012

M. Aguiar
Affiliation:
Centro de Matemática e Aplicações Fundamentais da Universidade de Lisboa Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Portugal Fundação Ezequiel Dias, Serviço de Virologia e Riquetisioses, Laboratório de dengue e febre amarela Rua Conde Pereira Carneiro 80, 30510-010 Belo Horizonte-MG, Brazil
B.W. Kooi
Affiliation:
Faculty of Earth and Life Sciences, Department of Theoretical Biology, Vrije Universiteit, De Boelelaan 1087, NL 1081 HV Amsterdam, The Netherlands
J. Martins
Affiliation:
Department of Mathematics, School of Technology and Management, Polytechnic Institute of Leiria Campus 2, Morro do Lena, Alto do Vieiro, 2411-901 Leiria, Portugal
N. Stollenwerk*
Affiliation:
Centro de Matemática e Aplicações Fundamentais da Universidade de Lisboa Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Portugal
*
Corresponding author. E-mail: maira@ptmat.fc.ul
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Abstract

In this paper we analyze the stochastic version of a minimalistic multi-strain model,which captures essential differences between primary and secondary infections in denguefever epidemiology, and investigate the interplay between stochasticity, seasonality andimport. The introduction of stochasticity is needed to explain the fluctuations observedin some of the available data sets, revealing a scenario where noise and complexdeterministic skeleton strongly interact. For large enough population size, the stochasticsystem can be well described by the deterministic skeleton gaining insight on the relevantparameter values purely on topological information of the dynamics, rather than classicalparameter estimation of which application is in general restricted to fairly simpledynamical scenarios.

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Type
Research Article
Copyright
© EDP Sciences, 2012

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