江滩地区人畜血吸虫病流行因素定量研究

QUANTITATIVE STUDY ON EPIDEMIOLOGICAL FACTORS OF HUMAN AND ANIMAL SCHISTOSOMIASIS IN MARSHLAND REGIONS

本文对江滩地区6个自然村的血吸虫病流行因素进行了定量研究，结果表明：江滩野粪密度与耕牛感染率和居民感染率呈正相关，相关系数检验结果非常显著（r1＝0．9344，r2＝0．8183，P值均＜0．01），其回归方程为：y1＝6．7808＋25．6486x1；y2＝2．1998＋3．3386x2；钉螺自然感染率与居民感染率呈正相关，相关系数检验结果亦非常显著（r3＝0．9540，P＜0．01），其回归方程为y3＝1．3743＋2．6255x3。提示江滩型地区控制居民血吸虫感染率，首先应消灭阳性钉螺，其次为减少滩地人畜粪便污染。

This study was carried out in six natural villages in the marshland areas of the Yangtze River to reveal the correlation between the infection rates of cattle and individuals and the density of wild faeces on the marshland or the natural infection rate of snails. The results showed that there was a significant linear correlation between the density of wild feaces and the infection rates of cattle and individuals (r1 = 0. 9344,P<0.01 ; r2 = 0. 8183, P<0.01). The linear regression formula was y1 = 6. 7808 + 25. 6486x1, y2 = 2.1998 + 3. 3386x2. Snail natural infection rate was mostly correlated with the infection rate of the individuals (r,3= 0. 9540,P < 0. 01 ), with a linear regression formu1a of y, = l' 3743 + 2' 6255x3. It suggested that the strategX on control of the infection rate of individuals in the schistosomiasis control pro gramme should be eradication of positive snails first,then reduction of the contamination on the marshland.