[Analysis of endemic situation of schistosomiasis in Jingzhou City from 2004 to 2014].

OBJECTIVE: To analyze the change of endemic situation of schistosomiasis in Jingzhou City of Hubei Province, so as to provide evidence for the development of future control strategy. METHODS: The data of endemic situation of schistosomiasis and the implementation of integrated control measures were collected and analyzed in the 9 counties (districts, cities) of Jing-zhou City from 2004 to 2014. RESULTS: The endemic situation of schistosomiasis appeared a decline year by year since 2004. The prevalence of human Schistosoma japonicum infection was 0.40% in 2014, which was reduced by 95.72% as compared to that in 2004, and the fitting exponential equation was y = 11.067e-0.240x. The incidence of acute schistosomiasis reduced to less than 0.5 per 100 000 in 2007. No acute infection was found since 2010, and no emergency epidemics occurred for successive 9 years. It was estimated that there were currently 22 547 people infected with S. japonicum, which reduced by 85.87% in relative to 2004. The prevalence of cattle S. japonicum infection reduced to 0 in 2014, with a 100% reduction as compared to that in 2004, and the fitting exponential equation was y = 15.69e-0.339 8x. The actual Oncomelania hupensis snail area was 31 084.00 hm2, which reduced of 1931.21 hm2 as compared to that in 2004, with a 5.91% reduction, and no schistosome-infected snails were found since 2012. Both human and animal schistosome infections reduced to less than 1% in all administrative villages in 2013. CONCLUSIONS: The implementation of the key schistosomiasis program and whole-county promotion and province-ministry joint integrated control program results in effective control of schistosomiasis in Jingzhou City. However, further control programs are required to consolidate the achievements, interrupt and eliminate schistosomiasis.

[Schistosomiasis control effect of county promotion and comprehensive control interventions in lake and marshland regions].

OBJECTIVE: To evaluate the schistosomiasis control effect of county promotion and comprehensive control interventions in Jingzhou City. METHODS: The data of schistosomiasis endemic situation of 9 counties (cities, districts) in Jingzhou City from 2006 to 2010 were collected by a retrospective survey method, and the schistosome infection situation of residents and cattle were selectively examined in November, 2010. RESULTS: The endemic situation in Jingzhou City from 2006 to 2010 presented a decline tendency. Compared to the infection rate of residents in 2006 (5.15%), that in 2010(2.22%) decreased by 56.89%, and no acute schistosomiasis cases were found. No sudden epidemic happened in the consecutive 5 years. The infection rate of cattle dropped from 8.04% in 2006 to 1.87% in 2010, with a reduction rate of 81.72%. The snail area and area with infected snails in 2010 were 31 070.61 hm2 and 321.70 hm2, respectively, with reduction rates of 3.68% and 71.20%, respectively, compared to those in 2006. Compared to 2006, the snail density and infection rate of snails in 2010 decreased by 63.76% and 64.74%, respectively. CONCLUSIONS: After the implementation of the project with county promotion and comprehensive control interventions in Jingzhou City, the schistosomiasis control work has obtained obvious achievement, and the endemic situation has been controlled effectively.