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东南亚地区9个国家,30多年来广泛使用持效杀虫剂来控制或根除疟疾。在60年代中期持效杀虫剂对控制媒介和防治疟疾取得很好效果。但是此后疟疾发病率开始上升,从1961年的10万疟疾病例1976年达到720万。疟疾回升的原因之一是媒介对杀虫剂产生抗性。以后开始采取治疗措施,到1983年下降到250万病例。开始用于防制疟疾媒介的持效杀虫剂是有机氯化合物,即二二三、狄氏剂和666。后
Nine countries in Southeast Asia have made extensive use of sustained-release pesticides to control or eradicate malaria for more than 30 years. Persistence of pesticides in the mid-1960s worked well for the control of the media and for the control of malaria. However, the incidence of malaria began to rise thereafter, from 700,000 malaria cases in 1961 to 7.2 million in 1976. One of the reasons for the malaria rise is that the media is resistant to pesticides. After starting to take treatment measures, by 1983 dropped to 2.5 million cases. Pesticidal pesticides that are starting to be used as a vehicle for the control of malaria are organochlorinated compounds, ie 233, Dieldrin, and 666. Rear