在基本消灭血吸虫病的地区,连续三年采用酶标对流和环卵沉淀反应进行流行病学监察,结果表明:两种血清免疫学反应的转阴率均逐年增高,阳性率均逐年下降。因两种血清免疫学反应均有考核疗效的价值,故受检人群的转阴率上升和阳性率下降,表明了所观察人群血清抗体水平不断在下降,亦即显示了两种血清免疫学反应均具有监察血吸虫病防治效果的价值。 In areas where schistosomiasis was basically eliminated, the epidemiological surveillance of the enzyme-convection and egg-ring precipitation was conducted for three consecutive years. The results showed that the rates of negative conversion of the two serum immunological reactions increased year by year with the positive rates declining year by year. Because of the two serum immunological reactions have the value of evaluation of the curative effect, so the test population increased negative rate and decreased positive rate, indicating that the observed population of serum antibody levels continue to decline, which shows two serum immunological reactions All have the value of monitoring the effect of schistosomiasis control.