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Table 1 Overview of the treatment arms of the experimental hut trial in the Mekong delta, southern Vietnam.

From: Impact of insecticide-treated nets on wild pyrethroid resistant Anopheles epiroticus population from southern Vietnam tested in experimental huts

    Actual Concentrationb mg AI/m2 (%RSD) Actual Concentration as % of the target concentration
Treatment arm Type of netA Target Concentration of unwashed nets mg AI/m2 unwashed 20× washed (*5× washed) unwashed 20× washed (*5× washed)
1 unwashed PermaNet 2.0 55 63.9 (2%) NA 116% NA
2 unwashed PermaNet 3.0 85 (upper part of the side panel) 81.6 (2%) NA 96% NA
3 20× washed PermaNet 2.0 55 66.0 (4%) 31.5 (3%) 120% 57%
4 20× washed PermaNet 3.0 85 (upper part of the side panel) 61.5 (12%) 33.6 (15%) 72% 40%
5 CTN, washed just before exhaustion 25 22.2 (13%) 5.4 (12%)* 89% 22%*
Control Untreated polyester net -- -- --   
  1. A CTN = Conventionally Treated Net, treated with Deltamethrin K-Othrin SC10, Bayer Crop Science. Surface of the nets: 14.2 m2
  2. b Actual content measured at the start of the trial on pieces from the side panel. Measured by the WHO reference centre 'Pesticides Research Department of the Walloon Agricultural Centre, Gembloux, Belgium'. %RSD, percentage relative standard deviation. NA, not applicable.