[Effect of sand buried on elimination of Oncomelania hupensis snails in marshland along Yangtze River in Jiangdu District, Jiangsu Province].

Objective: To evaluate the effect of sand buried on the elimination of Oncomelania snails in the marshland along the Yangtze River downstream.

Methods: The areas along the Yangtze River were chosen as the investigated objects in Jiangdu District, Jiangsu Province. The datum review and field investigations were used to observe the change of snail area after the sand buried.

[Epidemic situation and prevention and control countermeasures of imported falciparum malaria in Jiangdu District, Yangzhou City].

Objective: To explore the feasible prevention and control measures for imported falciparum malaria.

Methods: The epidemic situation of imported falciparum malaria and status of labor export were investigated by using the epidemic statistical method, epidemiological survey and follow-up survey.

Results: There were 46 direct network reported cases of imported falciparum malaria in Jiangdu District in 2011, and they were all export laborers to Africa, being aged from 30-49 years, Totally 28 patients of them had the history of disease in foreign countries, and 29 cases were in the same labor export services company.

[Technology of preventing oncomelania snail diffusion in east route of South-to-North Water Diversion Project II. Effect of sand buried and reed protection on snail control in area of water source].

Objective: To evaluate the effect of sand buried and reed protection on Oncomelania snail control in the area of water source of the east route of South-to-North Water Diversion Project.

Methods: The Oncomelania snail eggs were counted after the snails raised seven days in the sand of different contents in the spawning period. The survival of the snails was observed when the snails were raised on the sand surface in the laboratory.

[Impact of simulation operation high water level on Oncomelania hupensis natural growth in water diversion rivers of east route of South-to-North water Diversion Project].

Objective: To verify the impact of operation high water level on Oncomelania hupensis natural growth in the water diversion rivers of the east route of South-to-North Water Diversion Project.

Methods: The data of the daily mean water level were investigated in the stilling pool of Jiangdu Pumping Station during the water diversion under the emergency anti-drought, and the water level data of the previous year served as the control. The dynamic of natural growth of O.

[Exploration of model of Oncomelania snail survey post-transmission control in Jiangdu City].

Objective: To explore the model of Oncomelania snail survey in inland areas, so as to reduce the burden of farmers as well as to improve the quality of snail survey.

Methods: A database of environment in snail survey was established, and specialized personnel were organized at town level. The general survey combined with survey in turn was used.