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

Authors :
Fernando Portela Câmara
Ana Luisa Bessa Bacellar Gomes
Luiz Max Fagundes de Carvalho
Luiz Gustavo Veloso Castello
Source :
Revista da Sociedade Brasileira de Medicina Tropical, Vol 44, Iss 3, Pp 297-299 (2011)
Publication Year :
2011
Publisher :
Sociedade Brasileira de Medicina Tropical (SBMT), 2011.

Abstract

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.

Details

Language :
English
ISSN :
16789849 and 00378682
Volume :
44
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Revista da Sociedade Brasileira de Medicina Tropical
Publication Type :
Academic Journal
Accession number :
edsdoj.576357e687d94aef8a0dfc19380b8b93
Document Type :
article
Full Text :
https://doi.org/10.1590/s0037-86822011005000024