DYNAMIC OF INFECTED SNAILS IN MARSHLAND AREAS OF JIANGSU PROVINCE
- VernacularTitle:江苏省江滩地区感染性钉螺动态观察
- Author:
Feng WU
;
Yuji JIANG
;
Qingbiao HONG
;
Yixin HUANG
;
Leping SUN
;
Weiping XI
;
Yanping ZHANG
- Publication Type:Journal Article
- Keywords:
Marshland areas;
Positive snails;
Current distribution;
Fluctuation tendency
- From:
Chinese Journal of Schistosomiasis Control
1989;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To understand the distribution and fluctuation tendency of infected Oncomelania snails in marshland areas of Jiangsu Province in order to provide the scientific basis for acute schistosomiasis control. Methods In each county(city, district) 5-10 marshland areas with snails were sampled randomly, and of which 5-10 sites were selected. Fifty to one hundred snails were collected in each site and dissected by professionals to determine the natural infection rate. At the same time, the mollusiciding actions were carried out in the schistosome-positive snail sites and beaches. Results In 5 years, a total of 467 beaches have been checked and 102 positive beaches were find out and the snails detected. The positive rate of beaches was 21.84%(102/467). A total of 169200 snails were dissected , and of which 433 were positive snails. The natural infection rate was 0.2559%(433/169200). The infested areas and the number of positive snails in 2002 were 2.71 and 18.33 times of those in 1998 in Jiangsu Province. Conclusion In the continuous 5 years observation, the tendency of the population of positive snails and the infested areas were significantly growing, and there is a apotential threat for the acute infections. So, the keys of the following work should be controlling snails seriously in the marshlands and the rivers in connection with the Yangtze River, increasing the mollusiciding cover rate and improving the quality in the positive beaches, and surveying and treating the cattle time by time.
