Faye O, Konate L, Gaye O, Fontenille D, Sy N, Diop A, Diagne M, Molez J F
Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Sénégal.
Med Trop (Mars). 1998;58(4):355-60.
The efficacy of permethrin-treated bednets was evaluated in Wassadou, a hyperendemic village located in the Sudanese grasslands of southeast Senegal. Pretreatment data were collected between 1992 and 1993. Bednets were distributed to the whole population in June 1995 and impact of their use on vector populations and malaria transmission was evaluated until November 1995. This period corresponds to the rainy season during which malaria transmission is highest. Data were compared with a control village in which bednets were not distributed. Findings showed that use of bednets led to a sharp decrease in the density of the vector population and malaria transmission. The number of bites by Anopheles gambiae s.1. decreased 69%. The density of blood-laden and pregnant females inside dwellings decreased 91% and 96% respectively. The sporozoite index of females captured on the skin decreased 76% and the daily rate of entomological inoculation decreased 88%. This impact was not great enough to eliminate the risk of infection. Prolonged study over a period of 4 to 5 years is needed to evaluate the impact of long-term use of insecticide-treated bednets on vector population and malaria transmission.
在位于塞内加尔东南部苏丹草原的高度流行村庄瓦萨杜，对经氯菊酯处理的蚊帐的效果进行了评估。1992年至1993年期间收集了预处理数据。1995年6月向全体居民分发了蚊帐，并对其使用对病媒种群和疟疾传播的影响进行了评估，直至1995年11月。这一时期对应疟疾传播最高的雨季。将数据与未分发蚊帐的对照村庄进行了比较。结果表明，使用蚊帐导致病媒种群密度和疟疾传播急剧下降。冈比亚按蚊复合体的叮咬次数减少了69%。室内携带血液和怀孕雌蚊的密度分别下降了91%和96%。在皮肤上捕获的雌蚊的子孢子指数下降了76%，每日昆虫学接种率下降了88%。这种影响不足以消除感染风险。需要进行4至5年的长期研究，以评估长期使用经杀虫剂处理的蚊帐对病媒种群和疟疾传播的影响。
