Insecticide Resistance in Malaria Vectors in the Mekong Region
Author Information
Author(s): Van Bortel Wim, Trung Ho Dinh, Thuan Le Khanh, Sochantha Tho, Socheat Duong, Sumrandee Chalao, Baimai Visut, Keokenchanh Kalouna, Samlane Phompida, Roelants Patricia, Denis Leen, Verhaeghen Katrijn, Obsomer Valerie, Coosemans Marc
Primary Institution: Institute of Tropical Medicine, Belgium
Hypothesis
What is the insecticide resistance status of malaria vectors in the Mekong region?
Conclusion
A unique baseline data on insecticide resistance for the Mekong region is now available, enabling the follow-up of trends in susceptibility status.
Supporting Evidence
- Anopheles dirus s.s. was found to be susceptible to permethrin in most sites.
- Anopheles epiroticus showed high resistance to all tested pyrethroid insecticides.
- Resistance management is important due to the risk of migration of resistant mosquitoes.
Takeaway
Scientists studied mosquitoes in the Mekong region to see if they were resistant to insecticides used to control malaria. They found that some mosquitoes were resistant, but many were still susceptible.
Methodology
A network for monitoring insecticide resistance was set up, and bioassays were performed on adult mosquitoes using standard WHO susceptibility tests.
Potential Biases
Differences in morphological identification skills among field teams may have affected data accuracy.
Limitations
The study faced challenges in collecting the recommended number of mosquitoes for testing due to low density in some areas.
Participant Demographics
The study included major malaria vector species from Cambodia, Laos, Thailand, and Vietnam.
Digital Object Identifier (DOI)
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