Effects of Indoor Environmental Factors and House Structures on Vaporization of Active Ingredient from Spatial Repellent Devices in Rural Houses in Malawi.

Autor:	Kawada H; Department of Vector Ecology and Environment, Institute of Tropical Medicine, Nagasaki University, Japan., Nakazawa S; Department of Vector Ecology and Environment, Institute of Tropical Medicine, Nagasaki University, Japan., Ohashi K; Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., Japan., Kambewa EA; Vector Borne Disease Laboratory, Chancellor College, University of Malawi, Republic of Malawi., Pemba DF; Vector Borne Disease Laboratory, Chancellor College, University of Malawi, Republic of Malawi.
Jazyk:	angličtina
Zdroj:	Japanese journal of infectious diseases [Jpn J Infect Dis] 2022 May 24; Vol. 75 (3), pp. 288-295. Date of Electronic Publication: 2021 Nov 30.
DOI:	10.7883/yoken.JJID.2021.584
Abstrakt:	The use of a metofluthrin-impregnated spatial repellent device (MSRD) is a new and effective method for preventing mosquito blood feeding. Indoor environmental factors such as room temperature and ventilation rate are thought to be important for MSRD activity. Measurements of room temperature and vaporization of metofluthrin from MSRD in typical rural metal-roof and thatched-roof houses in southeastern Malawi were conducted. The relationship between house structure and the number of collected Anopheline mosquitoes with and without MSRD treatment was also investigated. The difference between daytime and nighttime room temperature was significantly higher in metal-roof houses than in thatched-roof houses. The vaporization of metofluthrin from the MSRD was not accelerated by the high room temperature, but by the high indoor air flow by ventilation. The number of mosquito collections was significantly higher in thatched-roof houses than in metal-roof houses. MSRD-treated thatched-roof houses have a higher probability of mosquito infestation, but the vaporization of metofluthrin is also higher because of indoor air flow, resulting in a reduction in mosquito numbers. Metal-roof houses with closed eaves reduce the probability of mosquito invasion, and a longer predicted effectiveness occurs with MSRD because of the controlled release of metofluthrin through lower indoor air flow.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu