OBJECTIVE:

To analyze the epidemiology of dengue, Zika, and chikungunya fever in the Northern Region of Brazil, from 2017 to 2024.

MATERIALS AND METHODS:

This is a descriptive ecological study that assessed epidemiological variables and average incidence rates of the three arboviruses across the seven states of the Northern Region, using data from the Notifiable Diseases Information System and the Brazilian Institute of Geography and Statistics.

RESULTS:

A progressive increase in probable cases of all three arboviruses was observed, with dengue showing the most pronounced growth trend. Tocantins reported the highest numbers of dengue and Zika cases, while Pará had the most significant number of chikungunya fever cases. In all diseases, young women, particularly those aged 20-39 years, were predominantly affected. A high proportion of records lacked information on education and pregnancy status, limiting detailed analysis of risk factors. Disease confirmation occurred mainly through clinical-epidemiological criteria for dengue and laboratory criteria for Zika and chikungunya fever, with most cases evolving favorably.

CONCLUSION:

Arboviruses continue to expand in the Brazilian Northern Region, influenced by both social determinants and climate change, highlighting the need for integrated epidemiological surveillance, improved sanitation, and public policies addressing the region's socio-environmental vulnerability.