Abstract:

Objective To observe the effect of infected snails control in hilly endemic regions, and provide basis for making out effective measures for infected snails control and elimination. Methods The snail survey data from 2005 to 2011 in Dayan township, Shitai county, were collected. The spots of infected snails were located by GPS, and the distribution of infected snails was drawn. The snail control measures were formulated yearly according to the situation of infected snails. Results The spots of infected snails reduced from 11 villages in 2005 to 1 village in 2011 in Dayan township, the areas with infected snails and the density of infected snails also decreased yearly. One village had not been found infected snails for 7 consecutive years, two villages for 6 consecutive years, one village for 5 consecutive years, two villages for 4 consecutive years, and one village had not been found infected snails for 2 consecutive years. Conclusion It should be emphasized on the quality of snail survey and control in the environment without infected snails, and infectious sources control should be implemented thoroughly. As for the complicated snail breeding sites,environment modification could be considered to change snail breeding environment.

Key words: Schistosomiasis, Infected snails, Control, Elimination