鄱阳湖区钉螺分布和血吸虫病易感地带的研究

本文报道鄱阳湖区615块,122万多亩洲滩钉螺调查和血吸虫病易感地带研究的结果,阐明了湖区钉螺分布的规律,以及钉螺、感染性钉螺和急性血吸虫病之间的相互关系。提出了血吸虫病易感地带的分类标准、区划、稳定性和在采取防制措施后的可变性。认为如能集中力量、集中目标,针对一类(易感)地带部署湖区血吸虫病防制工作,将有效地控制鄱阳湖区血吸虫病的流行.

SNAIL DISTRIBUTION AND SUSCEPTIBLE ZONES OF SCHISTOSOMIASIS IN ENDEMIC AREAS AROUND POYANG LAKE

To understand the situation of snail distribution and to explore the criteria of suscep-tible zones of schistosomiasis in endemic areas around Poyang Lake, a total of 1222910 mu of marshland in lake regions were surveyed for three years from 1982 through 1984 by 400 skillful observers. This article reports the relation between mean density of infected snails and incidence of acute schistosomiasis in marshland. We divided all susceptible marshlands of Poyang Lake area into three types, and found that about one fourth of the area belongs to the first type of susceptible zones, i.e., with high risk to schistosomiasis infection. Longitudinal observation showed that the types of susceptible zones changed very little unless measures of schistosomiasis control were taken.The results of field study suggested that we should put stress of schistosomiasis control on the first type of susceptible marshlands of Poyang Lake in future.