AI Article Synopsis
- The study investigated how both insecticide-resistant and susceptible malaria mosquitoes behave when approaching deltamethrin-treated nets using a wind tunnel approach.
- It found no significant differences in response times or spatial distribution between resistant and susceptible mosquitoes, indicating similar initial behaviors when nearing the nets.
- However, resistant mosquitoes tended to stay farther away from the treated nets, and the nets that were effective in laboratory settings caused less mortality when tested in the wind tunnel, suggesting the need for improved methods to assess the effectiveness of insecticidal nets.
Article Abstract
Flight behavior of insecticide-resistant and susceptible malaria mosquitoes approaching deltamethrin-treated nets was examined using a wind tunnel. Behavior was linked to resulting health status (dead or alive) using comparisons between outcomes from free-flight assays and standard World Health Organization (WHO) bioassays. There was no difference in response time, latency time to reach the net, or spatial distribution in the wind tunnel between treatments. Unaffected resistant mosquitoes spent less time close to (< 30 cm) treated nets. Nettings that caused high knockdown or mortality in standard WHO assays evoked significantly less mortality in the wind tunnel; there was no excitorepellent effect in mosquitoes making contact with the nettings in free flight. This study shows a new approach to understanding mosquito behavior near insecticidal nets. The methodology links free-flight behavior to mosquito health status on exposure to nets. The results suggest that behavioral assays can provide important insights for evaluation of insecticidal effects on disease vectors.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4047740 | PMC |
| http://dx.doi.org/10.4269/ajtmh.13-0755 | DOI Listing |
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