左旋咪唑防御日本血吸虫尾蚴感染的实验研究

目的　探讨左旋咪唑预防日本血吸虫尾蚴感染的作用。方法　盐酸左旋咪唑和左旋咪唑碱口服剂量为 2 6 .2 5 m g/kg,分别于小鼠感染前 2天口服 ,连服 7d;涂肤剂为 1.0 %、2 .0 %、3.0 %、5 .0 %和 7.0 % ,分别于感染前 2、1天和当天涂肤。停药后 4周解剖 ,检获虫体。结果　盐酸左旋咪唑水溶液和左旋咪唑碱水溶液分别口服 ,两者的减虫率都为 0 ;5 .0 %的盐酸左旋咪唑于感染当天涂肤、7.0 %盐酸左旋咪唑于感染前 1天涂肤 ,减虫率均为 10 0 .0 % ;2 .0 %、3.0 %和 5 .0 %的左旋咪唑碱于感染前 1天涂药 ,减虫率即可达到 10 0 .0 %。结论　左旋咪唑涂剂能防御日本血吸虫尾蚴的感染 ,左旋咪唑碱效果优于盐酸左旋咪唑。口服无效。

EXPERIMENTAL STUDIES ON EFFICACY OF LEVAMISOLE IN PREVENTION FROM SCHISTOSOMA JAPONICUM CERCARIA INFECTION

Objective To study the effect o f levamisole against the invasion of Schistosoma japonicum cercariae. Methods Mice infected wit h Schistosoma cercariae were administered orally with levamisole hydrochloride or alkali levamisole two days before the infectio n at a dose of 26.25 mg/kg for 7 days. The liniments of levamisole hydrochlorid e and alkali levamisole were embrocated on the mouse skin two days, one day and 0 day before the infection respectively, and the concentrations of the drug were 1%, 2%, 3%, 5% and 7% respectively. The experimental animals were dissected 4 we eks after the treatment and adult worms were collected. Results The worm reduction rates of mice administered orally with leva misole hydrochloride or alkali levamisole were both 0. The worm reduction rates were both 100% when the mice were embrocated with 5% levamisole hydrochloride on the infection day or with 7% levamisole hydrochloride one day before the infect ion. The worm reduction rates were all 100% when the mice were embrocated with 2 %, 3% or 5% alkali levamisole one day before the infection. Conc lusions Levamisole liniments can prevent from S . japonicum cercaria infection, and alkali levamisole is better th an levamisole hydrochloride. When levamisole is given orally, no effect was show n.