Snakebite envenomation in the Brazilian Amazon: a descriptive study

Abstract

Snakebite envenomation in the Brazilian Amazon is a recognized public health problem that does not receive the appropriate attention from key stakeholders. The morbidity rate is relevant, but still underestimated. Thus, the present study updates the current state of knowledge on snakebite envenomation in the Brazilian Amazon. It follows a descriptive method and contributes new knowledge about the dynamics of snakebites and the associated morbidity and mortality reported in the Brazilian Amazon. The study is based on information from cases registered and retrieved from the Brazilian Information System for Notifiable Diseases (Sistema de Informação de Agravos de Notificação-SINAN). The registers we studied covers a period of six years, 2010-2015. Most snakebites occurred in the states of Pará (30 693 cases, 43.34%) and Amazonas (9386 cases, 13.25%), with a higher prevalence in males of an economically active age. The main genus involved in bites was Bothrops sp. The mortality rate was 0.24 per hundred thousand and the case fatality rate was 0.51%. Although low case fatality and mortality rates were observed, much can still be done to prevent snakebites as they continue to be a serious public health problem considering the severity and potentially high economic impact for the individual and to society.

Keywords: envenoming; epidemiology; information systems; public health; snake venom; snakebites.