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[Chagas disease in Brazil].

M C Vinhaes1, J C Dias

  • 1Gerência Técnica de Doença de Chagas, Centro Nacional de Epidemiologia, Fundação Nacional de Saúde, Ministério da Saúde, Brasília, DF, 70070-000, Brasil.

Cadernos De Saude Publica
|December 19, 2000
PubMed
Summary

Chemical control has significantly reduced Chagas disease vectors and Trypanosoma cruzi in Brazil over 20 years. Ongoing surveillance is crucial for remaining challenges in specific regions.

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Area of Science:

  • Vector-borne diseases
  • Tropical medicine
  • Public health

Context:

  • Chagas disease, caused by Trypanosoma cruzi, is a significant public health concern in Brazil.
  • Historically, Triatoma infestans and Panstrongylus megistus have been the primary vectors.
  • Chemical control has been the main strategy for vector management.

Purpose:

  • To assess the impact of 20 years of chemical control on Chagas disease vectors and transmission in Brazil.
  • To identify persistent challenges and areas requiring continued surveillance.

Summary:

  • Continuous chemical control over two decades has led to a marked decrease in triatomine bug populations and Trypanosoma cruzi prevalence in Brazilian homes.
  • Significant reductions were observed for Triatoma infestans and Panstrongylus megistus.
  • Serological surveys, hospitalization data, and mortality records indicate a substantial decline in Chagas disease incidence.

Impact:

  • Chemical control has proven effective in reducing vector density and disease burden.
  • Residual foci in the Northeast and specific vector populations present ongoing challenges.
  • Decentralization requires states and municipalities to enhance epidemiological surveillance for Chagas disease control.

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