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Tiono, Alfred B; Pinder, Margaret; N?Fale, Sagnon; Faragher, Brian; Smith, Tom; Silkey, Mariabeth; Ranson, Hilary; Lindsay, Steve W (2015)
Publisher: BioMed Central
Journal: Trials
Languages: English
Types: Article
Subjects: Entomological inoculation rate, qx_600, Clinical malaria, qx_20, Cluster randomized controlled trial, wa_110, wa_240, wc_765, Malaria control, wc_750, Insecticide resistance management, Cluster randomized controlled trial., Study Protocol, Insect juvenile hormone mimic, Insecticide-treated bed net, Pyrethroid, Pyriproxyfen

Classified by OpenAIRE into

mesheuropmc: parasitic diseases
Background Recent reductions in malaria in sub-Saharan Africa have been associated with increased coverage with long-lasting insecticidal nets (LLINs). Pyrethroids are currently the only insecticide class used for treating nets, and the rapid increase in resistance to pyrethroids in vector mosquitoes may jeopardise future vector control. Nets containing a novel combination of permethrin, a pyrethroid, and pyriproxyfen, an insect juvenile hormone mimic, (PPF-LLIN) may enhance malaria control, as well as reducing the spread of pyrethroid-resistant mosquitoes. This trial will determine whether PPF-LLINs provide incremental protection against malaria over current best practice of LLINs and prompt treatment in an area with pyrethroid-resistant vectors. Methods A 2 armed cluster-randomised controlled trial will be conducted in Burkina Faso to assess whether PPF-LLIN (containing 2% permethrin and 1% pyriproxyfen w/w) provide better protection against clinical malaria in children than 2% permethrin-treated LLINs. Study subjects will be recruited and provided with LLINs at the start of the study. The LLINs will be exchanged for PPF-LLIN by cluster in a step-wedge fashion so 3 months before the end of the 2 year trial all participants will have a PPF-LLIN. The primary endpoint will be clinical malaria incidence measured by passive case detection in a cohort of children, aged 6 months to 5 years. Anaemia and parasite prevalence will also be measured in children during cross-sectional surveys. Exposure to malaria parasites will be assessed using light traps followed by identification of common vector species and their sporozoite infection rates. Safety evaluation will include recording of adverse events and pregnancy outcomes. The main endpoint analysis will include adjusting for distance between village clusters with different types of nets, as the impact of PPF-LLIN is likely to increase as larger areas are dominated by PPF-LLIN, reducing the spill over of mosquitoes from villages with LLINs. Discussion The step-wedge design is to measure the impact of an incrementally delivered environmental intervention where we expect the degree of control to be improved as more people use PPF-LLIN over a larger area. Trial findings will help inform policy makers on the effectiveness of PPF-LLIN nets for malaria control in areas of pyrethroid resistance. Trial registration ISRCTN21853394 ? AvecNet, registered on 3 April 2013. Electronic supplementary material The online version of this article (doi:10.1186/s13063-015-0606-4) contains supplementary material, which is available to authorized users.

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Funded by projects

  • EC | AVECNET

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