SHAWARBY A A, EL-REFAI A R, EL-HAWARY M F, EL-ESSAWI M
Bull World Health Organ. 1963;28(1):111-20.
In view of the development of resistance to DDT by Egyptian strains of body-lice, there is a need for another effective and safe insecticide with which they may be controlled. Trials were made in three governorates of the United Arab Republic to compare the effectiveness against these insects of 1% malathion and 10% DDT dusts, 30 g of powder being applied inside the clothing while it was being worn.When susceptibility tests were carried out with the WHO standard technique, the LC(50) was found to be less than 0.04% malathion. In the field, 1% malathion could effectively control lice for three weeks after one application.The 10% DDT dust was less effective, the lice in all three areas showing varying degrees of resistance. However, this insecticide is still considered to be reasonably effective for louse control in central Egypt; in Fayoum Governorate, it might be used but two applications would be needed; north of the Delta its effectiveness appears very doubtful.
鉴于埃及体虱菌株对滴滴涕产生了抗药性，需要另一种有效且安全的杀虫剂来控制它们。在阿拉伯联合共和国的三个省进行了试验，以比较1%马拉硫磷粉剂和10%滴滴涕粉剂对这些昆虫的有效性，在穿着衣服时将30克粉末撒在衣服里面。当采用世卫组织标准技术进行敏感性试验时，发现半数致死浓度（LC50）低于0.04%马拉硫磷。在实地，一次施用1%马拉硫磷可有效控制虱子三周。10%滴滴涕粉剂效果较差，所有三个地区的虱子都表现出不同程度的抗药性。然而，这种杀虫剂在埃及中部仍被认为对控制虱子相当有效；在法尤姆省，可以使用，但需要施用两次；在三角洲以北，其有效性似乎非常可疑。
