May 25, 2016

Zika in Rio de Janeiro: Assessment of basic reproduction number and comparison with dengue outbreaks

BioRxiv : the Preprint Server for Biology
Leonardo BastosCláudia T Codeço


Zika virus infection was declared a public health emergency of international concern in February 2016 in response to the outbreak in Brazil and its suspected link with congenital anomalies. In this study we use notification data and disease natural history parameters to estimate the basic reproduction number (R) of Zika in Rio de Janeiro, Brazil. We also obtain estimates of R of dengue from time series of dengue cases in the outbreaks registered in 2002 and 2012 in the city, when DENV-3 and DENV-4 serotypes respectively, had just emerged. Our estimates of the basic reproduction number for Zika in Rio de Janeiro based on surveillance notifications (R=2.33, 95% CI: 1.97 -- 2.97) were higher than those obtained for dengue in the city (year 2002: R= 1.70 [1.50 -- 2.02]; year 2012: R= 1.25 [1.18 -- 1.36]). Given the role of Aedes aegypti as vector of both the Zika and dengue viruses, we also derive R of Zika as a function of both dengue reproduction number and entomological and epidemiological parameters for dengue and Zika. Using the dengue outbreaks from previous years allowed us to estimate the potential R of Zika. Our estimates were closely in agreement with our first Zika's R estimation from notification data. Hence, these resu...Continue Reading

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Mentioned in this Paper

Dengue Fever
Dengue virus group
Genetic Vectors
Disease Susceptibility
Disease Transmission
Aedes aegypti

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