Analysis of schistosomiasis endemic situation of national surveillance sites in Yunnan Province from 2005 to 2016 / 中国血吸虫病防治杂志

ABSTRACT

Objective To analyze the dynamic endemic situation of schistosomiasis in Yunnan Province,and evaluate the effectiveness of the prevention and control interventions.Methods Four schistosomiasis heavy endemic villages(each of 4 en-demic counties)from 2005 to 2014 and 18 villages(each of 18 counties)in 2015 and 2016 were selected as survey sites.Then,the serological screening and etiological tests were carried out in the residents and floating population.The infection status of the livestock and relevant information of field feces and Oncomelania hupensis snails were surveyed.Results The serum positive rate was 8.40％to 25.40％in the local residents,and the rate of the female was higher than that of the male,the rates of 30 to 60 year age groups were higher than those of the other age groups,and the rates of peasants were higher.The feces positive rate was 0 to 6.59％,and the corrected infection rate was 0 to 1.67％in the local residents.The serum positive rate was 0 to 25.00％in the floating population.The infection rate in the livestock was 0 to 10.29％,and the main infected animals were the cattle,buffa-lo,dog,equine and pig.Totally 1 642 feces were tested,and no positives were found.The area with snail habitats was 753.97 hm2,and the density of living snails was 0.013 9 to 0.631 5 snails/0.1 m2.A total of 64 positive snails were found.The snail con-trol rate was 100％.Totally 161 schistosomiasis patients and 269 schistosome-infected animals were treated.Conclusions The schistosomiasis epidemic situation has been effectively controlled,and is at a low prevalence status in Yunnan Province.In order to block the transmission of schistosomiasis and eliminate schistosomiasis,the comprehensive control measures should be strengthened continually.