RESUMO
Objective To systematically evaluate the completion and implementation effect of the medium-long-term program for schistosomiasis control in Tianmen City, and to provide references for formulating the next-stage control plan. Methods According to "National Medium-long-term Plan for Prevention and Control of Schistosomiasis (2004-2015) Final Evaluation Scheme", data on population, livestock, and infection status of snails in Tianmen City from 2004-2019 was retrospectively collected database was established with Excel. SPSS 19.0 software was used for statistical analysis to evaluate the achievement of goals, and task completion and implementation effects. SaTScan was used to detect the aggregation area of schistosomiasis cases. Results From 2004 to 2019, Tianmen City completed the planned tasks. All 23 villages and towns in the epidemic area reached the transmission interruption standard. In 2004, the infection rate of schistosomiasis among the residents was lower than 0.01%, then decreased to 0 in 2015, with no acute cases occurring for 11 consecutive years. In 2004, the infection rate of farm cattle in the city was 3.5%, and it then decreased to 0 in 2011. The area of snails increased from 2.4735 million square meters in 2004 to 5.132 million square meters in 2010, and no infectious snails was detected after 2009. The awareness rate of schistosomiasis knowledge and correct behavior formation rate of primary and secondary school students and housewives in the city exceeded 95%. Through spatial distribution analysis, schistosomiasis cases in Tianmen City showed a certain aggregation. Conclusion The medium-long-term program for the prevention and control of schistosomiasis in Tianmen City from 2004 to 2019 achieved the expected results. The overall epidemic situation declined year by year, but schistosomiasis control still faces many challenges.
RESUMO
Objective To monitor the change patterns of the endemic situation of schistosomiasis in Tianmen City from 2015 to 2018, so as to provide the evidence for formulating the schistosomiasis control strategy in the city. Methods A total of 8 schistosomiasis surveillance sites were assigned in Tianmen City from 2015 to 2018, and the endemic situation of schistosomiasis and the related epidemiological factors were monitored. Results During the period from 2015 to 2018, a total of 15 983 local person-times and 3 629 mobile populations were detected for schistosomiasis using an indirect hemagglutination test (IHA) in Tianmen City, and the sero-prevalence was 0.88% to 1.44% and 0.96% to 2.39%, respectively; however, no egg-positives were identified. A total of 1 245 herd-times were detected, and no egg-positives were found in bovines. In addition, the areas of snail habitats were 116.69 to 117.23 hm2 and the mean densities of living snails were 0.07 to 0.17 snails/0.1 m2 during the study period; however, no infections were identified in snails. Conclusions The endemic situation of schistosomiasis appears low in Tianmen City; however, the factors related to schistosomiasis transmission remain in the city. The integrated strategy with emphasis on the control of infectious sources should be still intensified to consolidate the schistosomiasis control achievements.