Mosquito Resistance to Pyrethroids in Vietnam
Author Information
Author(s): Kawada Hitoshi, Higa Yukiko, Nguyen Yen T., Tran Son H., Nguyen Hoa T., Takagi Masahiro
Primary Institution: Institute of Tropical Medicine, Nagasaki University
Hypothesis
The study investigates the susceptibility of mosquito larvae to pyrethroids collected from used tires in Vietnam.
Conclusion
Aedes aegypti showed significant resistance to d-allethrin, particularly in southern Vietnam, likely due to extensive pyrethroid use for malaria control.
Supporting Evidence
- Aedes aegypti showed the most prominent reduction in susceptibility to d-allethrin compared to other species.
- Significant increases in susceptibility indices were observed with a decrease in latitude.
- The study collected larvae from 527 points across Vietnam, indicating a wide geographical scope.
Takeaway
The study found that mosquitoes in Vietnam, especially Aedes aegypti, are becoming less sensitive to a common insecticide because it has been used a lot in the area.
Methodology
Mosquito larvae were collected from used tires along national roads and tested for susceptibility to d-allethrin using a simplified bioassay.
Potential Biases
Potential bias due to the selection of collection sites along roads, which may not reflect broader ecological conditions.
Limitations
The study was limited to larvae collected from used tires and may not represent all mosquito populations in Vietnam.
Participant Demographics
The study focused on three mosquito species: Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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