Abstract

MONTEIRO, Eridan Soares Coutinho et al. Epidemiological and vector-related indicators of dengue fever in Teresina city, Piaui State, Brazil, from 2002 to 2006. Epidemiol. Serv. Saúde [online]. 2009, vol.18, n.4, pp.365-374. ISSN 1679-4974.  http://dx.doi.org/10.5123/S1679-49742009000400006.

This study aims at describing dengue fever epidemiological and vector-related indicators in Teresina, State of Piaui, Brazil from 2002 to 2006. The analysis has included cases registered in the Information System for Notifiable Diseases (Sinan), data on the monitoring of the Aedes aegypti in the Information System for Yellow Fever and Dengue Fever (FAD), and population and environmental data. The relation among notified cases, rainfall and temperature as well as between house infestation rate and pendency rate was analyzed using the Spearman correlation coefficient. In that period, 11,003 dengue fever cases were notified. Incidence rate varied from 592.7/100,000 population in 2002 to 19.5/100,000 population in 2004, with greater incidence in the 15-to 49-year-old group (305.5/100,000 population) and in females (60%). The lowest and highest lethality rate occurred, respectively, in 2003 (6.25%) and 2006 (20%), predominantly in the 20-to 49-year-old group (36.36%). There was a positive correlation among the number of cases, rainfall and temperature and there was no association between house infestation rate and pendency rate by stratum. Water storage reservoirs have predominated as the main breeding site. Each year, dengue fever incidence in the city of Teresina was higher during the first semester, which is the period of both higher rainfall and house infestation rate. The strategies for fighting the Ae. aegypti have not been efficacious, because the measures taken are not producing the expected epidemiological effects. It is necessary to adopt control measures with a special focus on the reduction of artificial breeding sites, mainly those used for house water storage, which lowers domestic risks associated with the proliferation of vectors.

Keywords : dengue; house infestation rate; Aedes aegypti; mosquito breeding sites.

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