[Endemic situation of schistosomiasis in a national surveillance site of Yangzhong City from 2015 to 2018].

OBJECTIVE

To analyze the endemic situation of schistosomiasis in a national surveillance site of Yangzhong City, so as to provide the scientific evidence for adjusting the local schistosomiasis control strategy and consolidating the control achievements.

METHODS

According to the National Schistosomiasis Surveillance Scheme (2014 version), the snail status, infections in humans and livestock and wild feces contamination were monitored in Zhinan Village, a national schistosomiasis surveillance site in Yangzhong City from 2015 to 2018.

RESULTS

Theareasofsnailhabitatsreducedfrom 8.10 hm in 2015 to 2.72 hm in 2018, and the mean density of living snails decreased from 0.27 snails/0.1 m in 2015 to 0.07 snails/0.1 m in 2018 in Zhinan Village; however, no infections were identified in snails during the period from 2015 to 2018. Serological testing for infections was performed in 2 034 local populations and 858 mobile populations from 2015 to 2018, and the sero-prevalence of human infections was 0.59% to 1.98%, with no egg-positives detected. A total of 79 goats were detected for infections from 2015 to 2018, and no egg-positives were found. In addition, no other livestock was found in Zhinan Village from 2015 to 2018, and no wild feces were found in snail habitats.

CONCLUSIONS

A great success has been achieved in schistosomiasis control in Yangzhong City; however, there are still snails breeding in the city. Monitoring of the risk factors pertaining to schistosomiasis transmission should be further intensified to consolidate the control achievements.