Elevated Temperature Decreases the Insecticidal Efficacy of Yahe LN Insecticide-Treated Nets: Implications for Transport and Storage.

IF 1.6 4区医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

American Journal of Tropical Medicine and Hygiene Pub Date : 2026-04-30 DOI:10.4269/ajtmh.25-0622

Holly Reichel, Melanie Koinari, Norelle L Daly, Stephan Karl

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引用次数: 0

Abstract

A recent durability study has revealed that Yahe LN® insecticide-treated nets (ITNs; Fujian Yamei Industry & Trade Co., LTD, Fuzhou, China) distributed in Papua New Guinea (PNG) in 2021 did not retain their insecticidal efficacy after several months post-distribution. Insecticide-treated nets are frequently shipped and stored in containers where they are exposed to elevated temperatures. When used in the tropics, ITNs may continue to be exposed to high ambient temperatures. The aim for the present study is to better understand the potential impact of elevated temperature during transport and storage on the insecticidal efficacy of Yahe LN ITNs and to investigate why they failed insecticidal efficacy tests after 6 months in PNG. To achieve this aim, Yahe ITNs were stored at elevated temperatures and tested using cone bioassays. The results revealed that ITNs exposed to temperatures between 35°C and 50°C, reflective of those in shipping containers, exhibited a significantly decreased insecticidal efficacy. The present study highlights the importance of developing temperature-stable ITN products and assessing current products for temperature stability.

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高温降低雅和LN驱虫蚊帐的杀虫效果：对运输和储存的影响。

最近的一项耐久性研究表明，2021年在巴布亚新几内亚（PNG）分发的雅和LN®杀虫剂处理蚊帐（ITNs；福建雅美工贸有限公司，中国福州）在分发几个月后仍未保持其杀虫功效。经过杀虫剂处理的蚊帐经常被运输并储存在集装箱中，在那里它们暴露在高温下。当在热带地区使用时，itn可能会继续暴露在高温环境中。本研究的目的是为了更好地了解运输和储存过程中温度升高对Yahe LN ITNs杀虫功效的潜在影响，并调查为什么它们在巴布亚新几内亚6个月后未能通过杀虫功效测试。为了实现这一目标，Yahe ITNs在高温下储存，并使用锥体生物测定法进行测试。结果表明，暴露在35 ~ 50℃温度下的ITNs（反映在集装箱温度下）杀虫效果显著下降。本研究强调了开发温度稳定的ITN产品和评估现有产品温度稳定性的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

American Journal of Tropical Medicine and Hygiene 医学-公共卫生、环境卫生与职业卫生

CiteScore

6.20

自引率

3.00%

发文量

508

审稿时长

3 months

期刊介绍： The American Journal of Tropical Medicine and Hygiene, established in 1921, is published monthly by the American Society of Tropical Medicine and Hygiene. It is among the top-ranked tropical medicine journals in the world publishing original scientific articles and the latest science covering new research with an emphasis on population, clinical and laboratory science and the application of technology in the fields of tropical medicine, parasitology, immunology, infectious diseases, epidemiology, basic and molecular biology, virology and international medicine. The Journal publishes unsolicited peer-reviewed manuscripts, review articles, short reports, images in Clinical Tropical Medicine, case studies, reports on the efficacy of new drugs and methods of treatment, prevention and control methodologies,new testing methods and equipment, book reports and Letters to the Editor. Topics range from applied epidemiology in such relevant areas as AIDS to the molecular biology of vaccine development. The Journal is of interest to epidemiologists, parasitologists, virologists, clinicians, entomologists and public health officials who are concerned with health issues of the tropics, developing nations and emerging infectious diseases. Major granting institutions including philanthropic and governmental institutions active in the public health field, and medical and scientific libraries throughout the world purchase the Journal. Two or more supplements to the Journal on topics of special interest are published annually. These supplements represent comprehensive and multidisciplinary discussions of issues of concern to tropical disease specialists and health issues of developing countries