Abstract:

Objective  To analyze the endemic status of schistosomiasis in 2015 and epidemiological trend of schistosomiasis in recent years in Anhui Province. Methods  The data on schistosomiasis prevalence were collected and analyzed in Anhui Province from 2004 to 2015. Results  By the end of 2015, schistosomiasis was reported in 9 cities, including 51 counties and districts. However, 23 counties/districts reached the criteria of transmission interruption, and 28 the criteria of transmission control. In 2015, 1.765 million population were subjected to blood screen and 0.024 million to stool sample screen, which revealed positive results in 24 537 and 10 individuals, respectively. A total of 5 684 advanced schistosomiasis cases were reported, yet there was no local cases of acute infection. The estimated cases were 8904. A total of 17 408 cattle were screened in 35 542 cattle being raised in the endemic areas, only 11 were found with eggs of Schistosomiasis japonicum, and the average infection was 0.07% in cattle. The areas infested with Oncomelania hupensis were 27144 hm2, in which 39.17 hm2 were associated with resurgence. No infected snails were found in 2015. The infection rate in humans and cattle, incidence rate of acute schistosomiasis and areas with infected snails tended to decline since 2004, with a decrease of 84.3%, 97.0%, 100% and 100%, respectively. The areas with snail distribution were fluctuated between 0.271 billion m2 and 0.310 billion m2. Conclusion  The schistosomiasis transmission appears to decline in Anhui Province in 2015, yet the transmission risks still exist in some areas. Strengthened prevention and surveillance is essential for following goal in schistosomiasis transmission interruption or even elimination of the schistosomiasis in Anhui areas.

Key words: Schistosomiasis, Endemic status analysis, Anhui Province