Sign in Subscribe
Mining industry

Mosquito-Borne Diseases: Malaria Transmission and Gold Mining in Colombia

Strategic Insights

— 1 min read

Research published in Malaria Journal has investigated the link between malaria transmission and gold mining in Colombia, identifying Anopheles species as primary vectors of the disease. In areas where gold mining is prevalent, the risk of malaria transmission is significantly higher due to environmental changes and the creation of breeding sites for malaria-carrying mosquitoes. The study, conducted in five malaria-endemic localities in El Bagre, Antioquia, Colombia, found that the entomological inoculation rate (EIR) varied across localities, ranging from 1.5 to 6.6 infective bites/person/month.

Key Takeaways:

  • In Colombia, gold mining is a significant economic activity that contributes to approximately 80% of annual malaria cases.
  • The study identified 11 Anopheles species, with six specimens positive for Plasmodium spp. infection through PCR testing.
  • Anopheles darlingi, Anopheles nuneztovari s.s., and Anopheles punctimacula were identified as malaria vectors, with their immature stages found in gold mining excavations.
  • The presence of Anopheles species in gold mining excavations indicates these habitats as potential breeding sites for malaria-carrying mosquitoes.
  • Implementing larval source management as a supplementary measure for LLINs (long-lasting insecticidal nets) and IRS (indoor residual spraying) in the malaria vector program is recommended for these areas.
  • The study highlights the importance of understanding the relationship between environmental changes and malaria transmission in areas with gold mining activities.
  • Martha Liliana Ahumada, Maria Camila Velasco-Pareja, Pablo Chaparro, Maria Fernanda Yasnot-Acosta, and Lorena Isabel Orjuela were additional authors on this research.
  • The study's findings have implications for malaria control and prevention efforts in gold mining areas.

Statistics:

  • Approximately 80% of annual malaria cases in Colombia are attributed to gold mining activities.
  • The entomological inoculation rate (EIR) varied across localities, ranging from 1.5 to 6.6 infective bites/person/month.
  • 6 out of 11 Anopheles species identified were positive for Plasmodium spp. infection through PCR testing.
  • The immature stages of Anopheles species were found in gold mining excavations.

Sources:

  • Rojas, M. A., et al. (2025). Anopheles species associated with malaria transmission in gold-mining areas of northwest Colombia. Malaria Journal, 24(1), 285.
  • Bmc (2025). Malaria Journal. London: Bmc, Campus, 4 Crinan St, N1 9XW, England.
  • NewsRx. (2025, September 15). Studies Conducted by Marco Andres Rojas et al on Malaria Recently Reported (Anopheles species associated with malaria transmission in gold-mining areas of northwest Colombia). Malaria Weekly, 72.

Read more