title: A simple field test for detecting pyrethroids on impregnated nets.
abstract: We tested a modified Beilstein method for detecting pyrethroids on bednets under laboratory conditions using an emulsifiable concentrate of permethrin (50 EC) for viability as a simple standardized field test and to judge its reliability for detecting different insecticide doses. At the recommended doses of permethrin (0.5 g/m2), sensitivity was near 100%, even when small pieces of fabric were tested and time of extraction was limited. In unwashed nets sensitivity stayed high (80-95%) down to 0.1 g active ingredient/m2. In untreated nets false positives were rare (0-2%). The test could become a valuable tool in vector control programmes: it is cheap, easy to learn and to perform. The Lot Quality Assurance Sampling method, using an upper and lower performance threshold, could be applied for monitoring the impregnation campaigns.
authors.affiliation: Institute for Tropical Medicine, Antwerp, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Verlé
authors.forename: N T
authors.initials: NT
authors.lastname: Ruyen
authors.forename: N T
authors.initials: NT
authors.lastname: Huong
authors.forename: N T
authors.initials: NT
authors.lastname: Be
authors.forename: A
authors.initials: A
authors.lastname: Kongs
authors.forename: P
authors.initials: P
authors.lastname: Van der Stuyft
authors.forename: M
authors.initials: M
authors.lastname: Coosemans
mesh_terms: D007306:Insecticides / Q000032:analysis*; D009032:Mosquito Control; D026023:Permethrin; D011722:Pyrethrins / Q000032:analysis*; D012680:Sensitivity and Specificity
chemical_list: D007306:Insecticides; D011722:Pyrethrins; D026023:Permethrin