Journal of Medical Entomology (2020) 57, 503-510

From Pestinfo-Wiki
Jump to: navigation, search
Aedes aegypti CDC-Gathany.jpgSelected publication
you are invited to contribute to
the discussion section (above tab)
Josué Herrera-Bojórquez, Emilio Trujillo-Peña, José Vadillo-Sánchez, Martin Riestra-Morales, Azael Che-Mendoza, Hugo Delfín-González, Norma Pavía-Ruz, Juan Arredondo-Jimenez, Erika Santamaría, Adriana E. Flores-Suárez, Gonzalo Vazquez-Prokopec and Pablo Manrique-Saide (2020)
Efficacy of long-lasting insecticidal nets with declining physical and chemical integrity on Aedes aegypti (Diptera: Culicidae)
Journal of Medical Entomology 57 (2), 503-510
Abstract: Fitting long-lasting insecticidal nets (LLIN) as screens on doors/windows has a significant impact on indoor-adult Aedes aegypti (L.), with entomological reductions measured in a previous study being significant for up to 2 yr post-installation, even in the presence of pyrethroid-resistant Aedes populations. To better understand the mode of LLIN protection, bioassays were performed to evaluate the effects of field deployment (0, 6, and 12 mo) and damage type (none, central, lateral, and multiple) on LLIN efficacy. Contact bioassays confirmed that LLIN residual activity (median knockdown time, in minutes, or MKDT) decreased significantly over time: 6.95 (95% confidence interval [CI]: 5.32–8.58) to 9.24 (95% CI: 8.69–9.79) MKDT at 0- and 12-mo age, respectively, using a pyrethroid-susceptible Aedes strain. Tunnel tests (exposing human forearm for 40 min as attractant) showed that deployment time affected negatively Aedes passage inhibition from 54.9% (95% CI: 43.5–66.2) at 0 mo to 35.7% (95% CI: 16.3–55.1) at 12 mo and blood-feeding inhibition from 65.2% (95% CI: 54.2–76.2) to 48.9% (95% CI: 26.4–71.3), respectively; both the passage/blood-feeding inhibition increased by a factor of 1.8–2.9 on LLINs with multiple and central damages compared with nets with lateral damage. Mosquito mortality was 74.6% (95% CI: 65.3–83.9) at 0 mo, 72.3% (95% CI: 64.1–80.5) at 6 mo, and 59% (95% CI: 46.7–71.3) at 12 mo. Despite the LLIN physical integrity could be compromised over time, we demonstrate that the remaining chemical effect after field conditions would still contribute to killing/repelling mosquitoes.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article

Database assignments for author(s): Gonzalo M. Vazquez-Prokopec

Research topic(s) for pests/diseases/weeds:
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Aedes aegypti Mexico