【摘要】 1987—1991年,我们采用饱和硝酸钠漂浮法作土壤虫卵分离调查。对每年春秋两季连续5年化疗的实验村的庭院、菜地和粪缸周围土壤中的寄生虫虫卵进行连续观察。化疗村在化疗后第2—5年土壤虫卵的检出率分别为28.67%、29.00%、24.67%和11.33%,存在逐年显著降低的趋势(X~2=26.54,P<0.001),不同环境中蛔虫卵和鞭虫卵的检出率及阳性密度亦逐年减少,且较对照村为低;结果表明反复化疗显著减少环境中虫卵污染。更多还原

【Abstract】 A control program against intestinal nematodiasis was undertaken from 1987 to 1991 in Jijia Village,with mass feces examination and selected chemoherapy twice a year.Parasitic eggs in the soils of courtyard,vegetable field as well as around the manure pits were separated by satuation NaNO₃ floatation method,toassess the effectiveness of this control activities.As a result,the intestinal nematode infection rates of all in-habitants decreased from 89.9% in 1987 to8.24% in 1991,and the positive rates of eggs in the soilsfrom28.67% to 11.33%.The relationship between the infection rate of population and the environmentalcontaminants is discussed in this paper.更多还原