Dengue e dengue hemorrágico em Belo Horizonte, 1996 - 2001

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

Prevention and control of dengue and hemorrhagic dengue, currently the arbovirosis of greatest impact in terms of morbimortality in the population, depend basically on the reduction of the disease´s vector´s population in the domicile and peridomicile, the main locations where the transmission of the disease occurs. In order to analyze the occurrence of dengue in the city of Belo Horizonte and its relation with infestation rates of Aedes aegypti in the city´s buildings between the years 1996-2001, the building infestation rates IP (proportion of buildings which are positive for the vector´s larvae) were analyzed, grouped according to the quartile distribution for each coverage area of the basic health units of the city. The average monthly incidence rates of the disease according to the month subsequent to the vector research were also analyzed. It was verified that Belo Horizonte recorded its first cases of the disease in 1996-1997, with serotype DEN-1 circulation and 7% vector infestation in the first semester of 1996 and 5% in October 1997. In the first semester of 1998, there was an epidemic of great magnitude, with over 86,000 cases reported (annual incidence rate of 4,085 cases per 100,000 inhabitants) and cocirculation of serotypes DEN-1 and DEN-2, with 34 cases of hemorrhagic dengue and 3 deaths reported. After a period of low viral circulation between 1999-2000, over 4,000 cases were confirmed in 2001 and ten cases of hemorrhagic dengue. During the analyzed period, 17 vector researches were carried out in the city, with values between 7.8% (first semester of 1997) and 0.3% (October 2000). The coverage areas with IP between 0.46% and 1.32% (2nd quartile) presented, in relation to the areas with IP under 0.46% (1st quartile), average monthly incidence rates twice as high. For the areas with IP between 1.33% and 2.76% (3rd quartile) and IP higher or equal to 2.77%, the incidence rates were respectively 5 and 7 times higher in relation to the areas with IP under 0.46 %. It is important to point out that, even with IP close to zero, there was viral transmission in the city, which indicates the limitations in this method of vector research for predicting dengue epidemics. The importance of viral monitoring and entomological surveillance are discussed, along with fundamental strategies to guide actions for disease control so as to minimize the social impact that dengue brings to the population.

ASSUNTO(S)

vigilância epidemiológica decs sistemas locais de saúde/tendências decs dissertação da faculdade de medicina da ufmg. febre hemorrágica da dengue decs dengue/epidemiologia decs saúde pública decs dissertações acadêmicas decs controle de vetores decs dengue/prevenção &controle decs aedes decs notificação de doenças/normas decs

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