Effect of Metofluthrin-Impregnated Spatial Repellent Devices Combined with New Long-Lasting Insecticidal Nets (Olyset® Plus) on Pyrethroid-Resistant Malaria Vectors and Malaria Prevalence: Field Trial in South-Eastern Malawi

Long-lasting insecticidal nets (LLINs) experience some operational problems that reduce their effectiveness, such as limited spaces for hanging, biting of mosquitoes outdoors, a shift of key biting time from midnight to dawn or dusk, and development of pyrethroid resistance in mosquitoes. The concep...

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Published inJapanese Journal of Infectious Diseases Vol. 73; no. 2; pp. 124 - 131
Main Authors Kawada, Hitoshi, Nakazawa, Shusuke, Shimabukuro, Kozue, Ohashi, Kazunori, Kambewa, Eggrey Aisha, Pemba, Dylo Foster
Format Journal Article
LanguageEnglish
Published Japan National Institute of Infectious Diseases, Japanese Journal of Infectious Diseases Editorial Committee 2020
Japan Science and Technology Agency
Subjects
Biting
Culicidae
Insecticide resistance
Malaria
Malawi
metofluthrin
mosquito
Mosquitoes
Operational problems
Repellency
spatial repellency
Vector-borne diseases
Vectors
Malawi
spatial repellency
metofluthrin
Malaria
Malawi
mosquito
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Summary:Long-lasting insecticidal nets (LLINs) experience some operational problems that reduce their effectiveness, such as limited spaces for hanging, biting of mosquitoes outdoors, a shift of key biting time from midnight to dawn or dusk, and development of pyrethroid resistance in mosquitoes. The concept of spatial repellency may be a countermeasure to overcome the above issues. The effect of the combined use of metofluthrin-impregnated spatial repellent devices (MSRDs) and LLINs (Olyset® Plus) on malaria prevalence and vector mosquitoes were examined in malaria endemic villages in south-eastern Malawi. The intervention reduced the infection rate in children as well as the number of pyrethroid-resistant vector mosquitoes. To achieve effective malaria control, continued intervention using MSRDs with 2 strips per 10 m2 at 3-month intervals to reduce the density of malaria mosquitoes is recommended.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1344-6304
1884-2836
DOI:10.7883/yoken.JJID.2019.311