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氯硝柳胺是对扁卷螺和膀胱螺的快速高效杀螺剂,实验室有效浓度为0.2～0.5毫克/升,现场实用浓度为1毫克/升。本文研究了氯硝柳胺的亚致死浓度对曼氏血吸虫尾蚴感染力的影响。共作了三项实验。一、为了选择用于以下实验的亚致死浓度,试验了不同浓度的氯硝柳胺对尾蚴的活动和活力的影响。结果表明,0.2～1.0毫克/升浓度对尾蚴致死。尾蚴接触此浓度5～20分钟即停止活动而死亡。接触0.1毫克/升浓度10分钟后尾蚴停止活动,但2小时内尾
Niclosamide is a fast and efficient molluscicide on flat snail and bladder snail. The effective concentration in laboratory is 0.2 ~ 0.5 mg / l, and the practical concentration is 1 mg / l. This article studies the sub-lethal concentration of niclosamide on Schistosoma mansoni cercaria infectivity. A total of three experiments were made. First, in order to select the sublethal concentrations used in the following experiments, the effects of different concentrations of niclosamide on cercariae activity and viability were tested. The results showed that 0.2 ~ 1.0 mg / L concentration of lethal to cercariae. Cercariae contact with this concentration of 5 to 20 minutes to stop activities and death. After exposure to a 0.1 mg / l concentration for 10 minutes cercariae ceased to act, but within 2 hours of caudal