Control of Chagas disease.

Area of Science:

• Public Health
• Infectious Disease Epidemiology
• Vector-borne Disease Control

Background:

• The Southern Cone Initiative (INCOSUR) demonstrated success in controlling domestic Trypanosoma cruzi transmission.
• Regional Chagas disease control initiatives were inspired by INCOSUR's success, expanding to Central America, the Andean, and Amazon regions.
• The Central American Initiative aimed to eliminate Rhodnius prolixus and control Triatoma dimidiata, facing challenges like limited scientific communities and fragmented health systems.

Purpose of the Study:

• To evaluate the achievements and challenges of the Southern Cone Initiative (INCOSUR) and subsequent regional Chagas disease control efforts.
• To highlight the role of international organizations like JICA in supporting fragmented health programs.
• To identify key strategies for effective vector control of Triatoma dimidiata.

Main Methods:

• The study reviews the implementation and outcomes of regional Chagas disease control programs.
• It analyzes factors contributing to success, such as scientific collaboration and cost-effectiveness.
• It identifies challenges in vector control, including species-specific difficulties and health system decentralization.

Main Results:

• INCOSUR is recognized as a substantial achievement in controlling domestic Trypanosoma cruzi transmission.
• The Central American Initiative led to virtual elimination of R. prolixus in Guatemala and revitalization of national programs in El Salvador and Honduras.
• Effective vector control for Triatoma dimidiata requires efficient geographic coverage, stratification, quality control, community mobilization, and information management.

Conclusions:

• Regional initiatives, building on INCOSUR's model, have made progress in Chagas disease vector control.
• Overcoming challenges in controlling native vector species necessitates a multi-faceted approach involving various stakeholders.
• Sustained comprehensive vector control requires shared responsibility among national programs, local health systems, communities, and local governments.