The state of Tocantins has a climate that favors the proliferation of Aedes aegypti and for this
reason it is considered an endemic state, with imminent risks of an outbreak. According to data
provided by the Ministry of Health (2019), in Brazil, Tocantins is the state with the highest
incidence of probable dengue cases, especially the municipality of Porto Nacional. Therefore,
the objective of this research was to assess the epidemiological profile for Dengue, Zika and
Chikungunya and to identify risk situations for mosquito proliferation, for the municipality of
Porto Nacional, based on the notifications from 2016 to 2019. This is a survey epidemiological,
descriptive and retrospective, using the Information System for Notifiable Diseases (SINAN)
and investigation form provided by the municipality's Epidemiological Surveillance. A
georeferenced map was also created using the Portable Basemap Server program to design the
Google Maps base in the software (ARC GIS). In Porto Nacional, 5,945 dengue cases were
reported in the period from 2016 to 2019, of which 1,575 cases were confirmed, with a high
number of dengue cases in 2019. The highest percentage occurred between the ages of 10 and
49 years (58% cases), being more reported in people with primary and secondary education.
The three most reported neighborhoods were Nova Capital; New village; and Jardim Brasília,
having identified risk areas by analyzing georeferencing. It was observed that there is no
relationship between annual rainfall and the increase in cases, since 2018, with the highest
rainfall, did not present the highest rates. However, there was a significant correlation between
the accumulated monthly averages, demonstrating the influence of seasonality on the
proliferation of the vector. Therefore, there are many factors that favor the proliferation of
Aedes aegypt, requiring permanent attention from health agencies and the population.
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