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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 112, No. 2, 2017, pp. 108-115
Bioline Code: oc17014
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 112, No. 2, 2017, pp. 108-115

 en Bio-efficacy, physical integrity, community usage and washing practices of mosquito nets treated with ICON MAXX long-lasting insecticidal treatment in India
Sahu, Sudhansu Sekhar; Gunasekaran, Kasinathan; Vijayakumar, Kilakootil Narayanan & Jambulingam, Purushothaman

Abstract

BACKGROUND New brands of potential long lasting insecticide nets (LLINs) and LLIN treatment kits require field evaluation before they are used in a vector control programme.

OBJECTIVES The aim of this study was to evaluate the bio-efficacy, usage, washing practice and physical integrity of nets treated with LLIN treatment kit, ICON MAXX in a phase III field trial in Odisha state, India.

METHODS A total of 300 polyester nets treated with ICON MAXX and 140 polyester nets treated conventionally with lambdacyhalothrin CS 2.5% ITNs were distributed. The bio-efficacy was evaluated with WHO cone bioassay. The chemical analysis of netting pieces was done at the beginning, after 12 and 36 months of the trial.

FINDINGS After one year of distribution of nets, the bioassay showed 100% mortality on both ITNs and ICON MAXX treated nets. At 36 months, the overall pass rate was 58.8% and the mean lambda-cyhalothrin content of LLINs was 34.5 mg ai/m2, showing a loss of 44.4% of the original concentration.

CONCLUSION ICON MAXX treated LLIN was found to retain bio-efficacy causing 97% knockdown of Anopheles stephensi check for this species in other resources up to 30 months and met the WHOPES criteria. However, the desired bio-efficacy was not sustained up to 36 months.

Keywords
ICON MAXX; lambda-cyhalothrin; long-lasting insecticidal treatment of nets; LLIN treatment kit; Odisha; India

 
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