Kawada Hitoshi, Temu Emmanuel A, Minjas Japhet N, Matsumoto Osamu, Iwasaki Tomonori, Takagi Masahiro
Department of Vector Ecology & Environment, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan.
J Am Mosq Control Assoc. 2008 Sep;24(3):404-9. doi: 10.2987/5743.1.
Metofluthrin is a newly synthesized pyrethroid possessing high knockdown and lethal activity against mosquitoes. Studies of metofluthrin-impregnated plastic strips have been performed with dengue vectors. This study reports the efficacy of the new prototypes of metofluthrin-impregnated plastic strips against malaria vectors, Anopheles gambiae complex, in the Kongo villages of Bagamoyo district in coastal Tanzania. The study, using 20 houses, half intervention, half control, was conducted for a 124-day period. Pyrethrum spray sheets and Centers for Disease Control and Prevention light traps were used to sample mosquito population indices. The mosquito density indices of the intervention houses were observed to be significantly lower than those of the control houses when pyrethrum spray sheet collection was used (F = 4.61, 1 df, P = 0.038; 98.7% reduction of total mosquito collection compared with that for the controls). These low indices were observed despite the large openings found in Bagamoyo houses, which were predicted to have a considerable negative effect on the spatial repellency of metofluthrin. Based on the present results, the pyrethrum spray sheet collection was the better of the 2 collection methods.
甲氧氟氯菊酯是一种新合成的拟除虫菊酯，对蚊子具有高击倒活性和致死活性。已对登革热媒介进行了甲氧氟氯菊酯浸渍塑料条的研究。本研究报告了甲氧氟氯菊酯浸渍塑料条新原型对坦桑尼亚沿海巴加莫约区刚果村庄疟疾媒介冈比亚按蚊复合体的效果。该研究使用20所房屋，一半为干预组，一半为对照组，为期124天。使用除虫菊酯喷雾片和疾病控制与预防中心的诱蚊灯来采集蚊虫种群指数。当使用除虫菊酯喷雾片采集时，观察到干预房屋的蚊虫密度指数显著低于对照房屋（F = 4.61，自由度为1，P = 0.038；与对照组相比，总蚊虫采集量减少了98.7%）。尽管在巴加莫约的房屋中发现有大的开口，预计这会对甲氧氟氯菊酯的空间驱避性产生相当大的负面影响，但仍观察到这些低指数。根据目前的结果，除虫菊酯喷雾片采集是两种采集方法中较好的一种。
