Participatory Risk Mapping of Malaria Vector Exposure in Northern South America using Environmental and Population...

Area of Science:

• Environmental science
• Public health
• Spatial analysis

Background:

• Malaria elimination is a significant public health challenge in tropical regions.
• Northern South America faces persistent malaria transmission issues.

Purpose of the Study:

• To develop a high-resolution malaria risk map for Colombia and surrounding areas.
• To assess the map's accuracy in predicting malaria risk and vector distribution.

Main Methods:

• Participatory multi-criteria decision analysis incorporating expert opinion.
• Development of a 90x90m spatial resolution risk map using environmental and population data.
• Comparison of risk map with malaria case data and Anopheles vector occurrence points.

Main Results:

• A weak correlation was observed between municipio-level risk scores and malaria cases.
• Pixel-level risk scores showed a significant association with the occurrence of Anopheles albimanus and Anopheles darlingi.
• The risk map accurately reflects potential vector exposure rather than actual malaria transmission patterns.

Conclusions:

• The developed risk map is a valuable tool for identifying areas of potential vector exposure.
• Public health authorities can use this map to prioritize vector control measures.
• The findings support targeted interventions to limit human-vector contact and advance malaria elimination goals.