[Effect of integrated measures on schistosomiasis transmission--interruption in hilly areas].

OBJECTIVE: To evaluate the effect of control integrative measures which persist in snail eradication and chemotherapy on schistosomiasis transmission-interruption in hilly areas. METHODS: The data of integrated control and endemic situation of schistosomiasis from 2004 to 2014 were collected, and the control effect of integrated measures was evaluated. RESULTS: From 2004 to 2014, both the Oncomelania hupensis snail area and density of living snails of Jurong City were reduced from 43.13 hm2 and 1.48 snails/0.1 m2 to 0; the residents' seropositive rate declined continuously; the residents' and students' awareness rates on schistosomiasis control were increased from 88.43% and 82.04% to 92.56% and 95.74% respectively; the snail area was significantly negatively correlated with the coverage rate of snail control (r = -0.864, P < 0.05). CONCLUSIONS: In the hilly areas, the schistosomiasis control integrated measures which persist in snail eradication and chemotherapy could control the endemic situation rapidly and steadily, accelerating to achieve the goal of schistosomiasis transmission-interruption.

[Effect of comprehensive schistosomiasis control in Bianmin River of Jurong City from 2000 to 2011].

OBJECTIVE: To evaluate the effect of comprehensive control of schistosomiasis in the Biamin River water system. METHODS: The distribution of Oncomelania snails and schistosome infections of residents and cattle were investigated longitudinally in Biamin River system from 2000 to 2011. RESULTS: After the comprehensive control of schistosomiasis, the average densities of infected snails decreased from 0.013 snails/0.1 m2 to 0, the average densities of living snails decreased from 7.43 snails/0.1 m2 to 0.38 snails/0.1 m2, the infected snail area decreased from 0.08 hm2 to 0, the snail area decreased from 17.84 hm2 to 10.57 hm2, and the crowd serological positive rate decreased from 6.90% to 0.96%. CONCLUSIONS: The snail habitats have been eliminated obviously by the comprehensive measures including concrete banks of rivers connecting with the Yangtze River. Thus the schistosomiasis situation has been controlled effectively. However, the snail spread from other schistosomiasis endemic places could not avoided, so we still need to strengthen the snail surveillance and snail control of the rivers connecting with the Yangtze River.