SciELO - Scientific Electronic Library Online

 
vol.46 issue2The characteristics, clinical manifestations and outcomes of pandemic influenza A (H1N1) 2009 in the elderlyAutoantibody profile in individuals with chronic hepatitis C author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista da Sociedade Brasileira de Medicina Tropical

Print version ISSN 0037-8682

Abstract

PIRES NETO, Roberto da Justa et al. Pandemic influenza A (H1N1) 2009: epidemiological analysis of cases in a tropical/semi-arid region of Brazil. Rev. Soc. Bras. Med. Trop. [online]. 2013, vol.46, n.2, pp.141-146. ISSN 0037-8682.  http://dx.doi.org/10.1590/0037-8682-0016-2012.

Introduction

The year 2009 marked the beginning of a pandemic caused by a new variant of influenza A (H1N1). After spreading through North America, the pandemic influenza virus (H1N1) 2009 spread rapidly throughout the world. The aim of this study was to describe the clinical and epidemiological characteristics of cases of pandemic influenza in a tropical/semi-arid region of Brazil.

Methods

A retrospective study analyzed all suspected cases of pandemic influenza (H1N1) 2009 reported in the Ceará State through the National Information System for Notifiable Diseases during the pandemic period between 28 April, 2009 and November 25, 2010.

Results

A total of 616 suspected cases were notified, 58 (9.4%) in the containment phase and 558 (90.6%) in the mitigation phase. Most cases were of affected young people resident in the City of Fortaleza, the largest urban center in the State of Ceará. The most frequent symptoms presented by the cases with confirmed infection were fever, cough, myalgia, arthralgia, and nasal congestion. Mortality rate was 0.0009/1,000 inhabitants and lethality was 5.6%. Deaths were observed only in the mitigation phase. Mortality rates were similar for both sexes but were higher in the age group under 5 years.

Conclusions

The study suggests that the influenza A (H1N1) pandemic in this tropical/semi-arid region had a lower magnitude when compared to states in the Southern and Southeastern regions of Brazil.

Keywords : Pandemic influenza (H1N1) 2009; Tropical/semi-arid region; Epidemiology; Clinical characteristics.

        · text in English     · English ( pdf )