Effect of gradient and regetation on distribution of schistosome infected Oncomelania snails in Dongting Lake marshland
- VernacularTitle:洞庭湖洲滩坡度与植被对感染性钉螺分布范围的影响
- Author:
Gang HU
;
Shangjiong ZHUO
;
Changlin HUANG
;
Ping YI
;
Tong LIU
;
Yushu ZHAN
- Publication Type:Journal Article
- Keywords:
Schistosoma japonicum;
Infected Oncomelania snail;
Marshland;
Distribution environment;
Ground elevation;
Gradient;
Vegetation
- From:
Chinese Journal of Schistosomiasis Control
2010;22(2):136-140
- CountryChina
- Language:Chinese
-
Abstract:
Objectives To investigate the distribution of Schistosoma japonicum infected Oncomelania snails in the marshland of Dangting Lake region,and explore the effects of gradient and vegetation on the distribution of the infected snails.Methods Three marshland areas in upstream and downstream of Dongting Lake were selected.The snail distribution was investigated and the ground elevation was assessed (Wusong's elevation of zero)and the vegetation types were also recorded from 1987-1989 and 2009.Results In the 3 types of snail habitats of the marshland,the average rate of areas with infected snails was 35.5%,and the snails mainly distributed beside the embankment and slope zone.More infected snails were found in the high altitude and steep slope zone,while no infected snails were found in the low altitude and flat slope zone,and reed areas as well.Conclusion The Schistosoma japonicum infected snails in the marshland of Dongting Lake mainly distribute beside the embankment and slope zoon,and are correlated with the water level in flood seasons and the activities of definitive hosts.
