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Bioefficacy and durability of Olyset?Plus, a permethrin and piperonyl butoxide-treated insecticidal net in a 3-year long trial in Kenya

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贫困所致传染病(英文) 2021年第6期 16-26页

作者： Gichuki Paul M. Kamau Luna Njagi Kiambo Karoki Solomon Muigai Njoroge Matoke-Muhia Damaris Bayoh Nabie mathenge evan Yadav Rajpal S. Eastern & Southern Africa Centre of International Parasite Control Kenya Medical Research Institute Nairobi Kenya Centre for Biotechnology Research and Development Division of National Malaria Programme Ministry of Health Department of Health Kirinyaga County Kirinyaga Centre for Global Health Research Kisumu Department of Control of Neglected Tropical Diseases World Health Organization Geneva Switzerland

Background: Long-lasting insecticide nets (LLINs) are a core malaria intervention. LLINs should retain efficacy against mosquito vectors for a minimum of three years. Efficacy and durability of Olyset? Plus, a permethrin and piperonyl butoxide (PBO) treated LLIN, was evaluated versus permethrin treated Olyset? Net. In the absence of WHO guidelines of how to evaluate PBO nets, and considering the manufacturer’s product claim, Olyset? Plus was evaluated as a pyrethroid ***: This was a household randomized controlled trial in a malaria endemic rice cultivation zone of Kirinyaga County, Kenya between 2014 and 2017. Cone bioassays and tunnel tests were done againstAnopheles gambiae Kisumu. The chemical content, fabric integrity and LLIN survivorship were monitored. Comparisons between nets were tested for significance using the Chi-square test. Exact binomial distribution with 95% confidence intervals (95% CI) was used for percentages. The WHO efficacy criteria used were ≥ 95% knockdown and/or ≥ 80% mortality rate in cone bioassays and ≥ 80% mortality and/or ≥ 90% blood-feeding inhibition in tunnel ***: At 36 months, Olyset? Plus lost 52% permethrin and 87% PBO content; Olyset? Net lost 24% permethrin. Over 80% of Olyset? Plus and Olyset? Net passed the WHO efficacy criteria for LLINs up to 18 and 12 months, respectively. At month 36, 91.2% Olyset? Plus and 86.4% Olyset? Net survived, while 72% and 63% developed at least one hole. The proportionate Hole Index (pHI) values representing nets in good, serviceable and torn condition were 49.6%, 27.1% and 23.2%, respectively for Olyset? Plus, and 44.9%, 32.8% and 22.2%, respectively for Olyset? Net but were not significantly ***: Olyset? Plus retained efficacy above or close to the WHO efficacy criteria for about 2 years than Olyset? Net (1-1.5 years). Both nets did not meet the 3-year WHO efficacy criteria, and showed little attrition, comparable physical durability and survivorship, with

关键词： Anopheles gambiae Bioefficacy Durability Kenya Long-lasting insecticidal net Olyset? Net Olyset? Plus Permethrin Piperonyl butoxide

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Bioefcacy and durability of Olyset® Plus, a permethrin and piperonyl butoxide-treated insecticidal net in a 3-year long trial in Kenya

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Infectious Diseases of Poverty 2021年第6期10卷 16-26页

作者： Paul M.Gichuki Luna Kamau Kiambo Njagi Solomon Karoki Njoroge Muigai Damaris Matoke‑Muhia Nabie Bayoh evan mathenge Rajpal S.Yadav Eastern&Southern Africa Centre of International Parasite Control Kenya Medical Research InstituteNairobiKenya School of Health Sciences Meru University of Science and TechnologyMeruKenya Centre for Biotechnol‑ogy Research and Development Kenya Medical Research InstituteNairobiKenya Division of National Malaria Programme Ministry of HealthNairobiKenya Department of Health Kirinyaga CountyKirinyagaKenya Centre for Global Health Research Kenya Medical Research InstituteKisumuKenya Centers for Disease Control and Prevention KisumuKenya Department of Control of Neglected Tropical Diseases World Health OrganizationGenevaSwitzerland

Background:Long-lasting insecticide nets(LLINs)are a core malaria *** should retain efficacy against mosquito vectors for a minimum of three *** and durability of Olyset®Plus,a permethrin and piperonyl butoxide(PBO)treated LLIN,was evaluated versus permethrin treated Olyset®*** the absence of WHO guidelines of how to evaluate PBO nets,and considering the manufacturer’s product claim,Olyset®Plus was evaluated as a pyrethroid ***:This was a household randomized controlled trial in a malaria endemic rice cultivation zone of Kirinyaga County,Kenya between 2014 and *** bioassays and tunnel tests were done against Anopheles gambiae *** chemical content,fabric integrity and LLIN survivorship were *** between nets were tested for signifcance using the Chi-square *** binomial distribution with 95%confdence intervals(95%CI)was used for *** WHO efcacy criteria used were≥95%knockdown and/or≥80%mortality rate in cone bioassays and≥80%mortality and/or≥90%blood-feeding inhibition in tunnel ***:At 36 months,Olyset®Plus lost 52%permethrin and 87%PBO content;Olyset®Net lost 24%*** 80%of Olyset®Plus and Olyset®Net passed the WHO efcacy criteria for LLINs up to 18 and 12 months,respec‑*** month 36,91.2%Olyset®Plus and 86.4%Olyset®Net survived,while 72%and 63%developed at least one *** proportionate Hole Index(pHI)values representing nets in good,serviceable and torn condition were 49.6%,27.1%and 23.2%,respectively for Olyset®Plus,and 44.9%,32.8%and 22.2%,respectively for Olyset®Net but were not signifcantly ***:Olyset®Plus retained efcacy above or close to the WHO efcacy criteria for about 2 years than Olyset®Net(1–1.5 years).Both nets did not meet the 3-year WHO efcacy criteria,and showed little attrition,comparable physical durability and survivorship,with 50%of Olyset®Plus having good and serviceable condition after 3 *** community educat

关键词： Anopheles gambiae Bioefficacy Durability Kenya Long-lasting insecticidal net Olyset®Net Olyset®Plus Permethrin Piperonyl butoxide

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