Dynamic behavior of sylvatic yellow fever in Brazil (1954-2008)


Autoria(s): Câmara,Fernando Portela; Gomes,Ana Luisa Bessa Bacellar; Carvalho,Luiz Max Fagundes de; Castello,Luiz Gustavo Veloso
Data(s)

01/06/2011

Resumo

INTRODUCTION: Sylvatic yellow fever (SYF) is enzootic in Brazil, causing periodic outbreaks in humans living near forest borders or in rural areas. In this study, the cycling patterns of this arbovirosis were analyzed. METHODS: Spectral Fourier analysis was used to capture the periodicity patterns of SYF in time series. RESULTS: SYF outbreaks have not increased in frequency, only in the number of cases. There are two dominant cycles in SYF outbreaks, a seven year cycle for the central-western region and a 14 year cycle for the northern region. Most of the variance was concentrated in the central-western region and dominated the entire endemic region. CONCLUSIONS: The seven year cycle is predominant in the endemic region of the disease due the greater contribution of variance in the central-western region; however, it was possible identify a 14 cycle that governs SYF outbreaks in the northern region. No periodicities were identified for the remaining geographical regions.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0037-86822011000300006

Idioma(s)

en

Publicador

Sociedade Brasileira de Medicina Tropical - SBMT

Fonte

Revista da Sociedade Brasileira de Medicina Tropical v.44 n.3 2011

Palavras-Chave #Sylvatic yellow fever #Periodicity #Spectral analysis #Epidemiology
Tipo

journal article