Fifty residual Oncomelania snail points were found in Guangxi Zhuang Autonomous Region from 1998 to 2009,and the snail area was 14.9 hm2.The residual snail area increased year by year with complex environment.

In order to understand the distribution of schistosomiasis in mobile population in Guangxi zhuang Autonomous Region, field investigation was conducted in 19 endemic villages selected by cluster sampling. The mobile people who were older than 3 years old were investigated by questionnaire and indirect hemagglutination( IHA) , then the IHA-positive ones were detected by fecal examination. Meanwhile, a snail survey was carried out. The results showed that a total of 2 866 people were investigated , among which 1 380 came from 143 endemic areas. A total of 2 428 people were involved in IHA examination with a positive rate of 3.46% , and the rate of people from endemic areas were significantly higher than that of ones from non-endemic areas( P < 0.01). Sixty people were involved in fecal examination, and the results were all negative. An area of 899. 3 hm~2 was surveyed, and the snail area was 4.97 hm~2, while none of positive snails were found. It is suggested that the mobile population is the main risk factor for potential schistosomiasis transmission in Guangxi, and the surveillance on this population should be strengthened.