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Introduction: The arbovirus proposes an important problem of public health in Brazil, especially in the Amazon, due to its capacity to cause outbreaks with high levels of morbidity-mortality in humans as well as in animals. Objective: This paper had the objective to estimate the prevalence of antibodies to arbovirus in communities that live under the influence of the artificial lake of UHE Tucuruí in the State of Pará, Brazil. Method: The analytical transversal study has selected 657 blood serum samples of individuals over 18, both genders, residents at the Sustainable Development Reserves (SDR) in the region of the lake of UHE Tucuruí. The epidemiological information has been registered in an instrument especially designed for such a study and the blood samples were collected in two periods of high and low tide of the lake. The blood serum tests were performed by the method of hemagglutination inhibition (HI). Results: The results revealed a prevalence of positive antibodies to arbovirus of 85.0%, being 84.1% related to Flavivirus (vaccine strain of YFV), 25.5% related to Alphavirus and 34.6% to Bunyavirus. The results of serum prevalence to arbovirus between the periods of high tide and low tide have revealed significance amongst the Alphavirus, not observed in the other families. Conclusion: In general, the data from this paper have suggested that the anthropoid actions on the environment of the lake have become determinant factors for the prevalence of arboviral antibodies. [ABSTRACT FROM AUTHOR]

Despite the serious threat to public health that it represents, hazardous household waste (HHW) is not perceived as dangerous by a majority of the population. Existing waste management systems contribute to this misperception, by underestimating the importance of these residues. This, in practice, reflects the lack of knowledge of citizens about the risks and about their responsibility. This study aimed to identify the major HHW generated and disposal practices of the population of São Luís District and know the HHW management situation of the municipality of Canoas, Brazil. We conducted a neighborhood survey, identifying the generation and destination of 15 types of HHW. The situation of the management of this waste was obtained through consultations with the City of Canoas, where we observed little effective action to correct mismanagement. With the aim of improving the current administration, this paper proposes the use of the Family Health Strategy as a liaison for implementation of an appropriate hazardous household waste management program. The role of Community Health Workers restates the important potential for the integration of environmental education and preventive action. [ABSTRACT FROM AUTHOR]