Assessment of risk factors of schistosomiasis transmission control in Jingzhou City / 中国血吸虫病防治杂志

Objective To understand the key risk factors of schistosomiasis transmission in Jingzhou City,so as to provide the evidence for improving the treatment of these risk factors. Methods Each village of six counties was investigated and 3 envi-ronments were surveyed each village for the distribution of Oncomelania snails and animal stools in the field. The results were ana-lyzed and the risk factors of schistosomiasis transmission were assessed. Results The density of living snails was 0.43 snails per 0.1 m2,the frequency of the frames with snails was 9.12%,and no schistosome infected snails were found. All of the animal stools collected from the field were from bovines. The schistosome positive rate of animal stools was 37.50%(3/8)among the environ-ments,and the schistosome infection rate of stools was 8.11%(3/37). The schistosome infection rate of animal stools was 0 near the residence living sites,and the positive rates were 12.50%and 8.33%in the ditches and slopes,respectively(χ2=0.07,P>0.05). Conclusions Bovine is still the main infectious source of schistosomiasis,i.e. the main risk factor of the disease transmis-sion. Therefore,the strategy of controlling bovine should be strengthened.

Investigation on field feces in schistosomiasis endemic areas in Jingzhou City / 中国血吸虫病防治杂志

Objective To understand the status of field feces in Jingzhou City, so as to provide the evidence for improving the control measures to interrupt the transmission routes of schistosomiasis. Methods The distribution of field feces was investigated in 27 schistosomiasis endemic villages in Gong’an,Jianli,Jiangling,Honghu and Shishou counties(cities)from 2010 to 2012. The schistosome positive status of the field feces was surveyed with the hatching method. Results There were 1 366 field feces and the average density was 0.089 2 feces per 100 square meters in this survey. The cattle feces,human feces,dog feces and elk feces respectively accounted for 99.71%,0.07%,0.15% and 0.07% in the survey. The infection rates of the field feces were 1.46%and 2.42%in the channels and bottomlands,respectively(P>0.05). The average rate of infected field feces was 3.21%in 2010,0.36%in 2011,and 1.60%in 2012,and the difference between 2010 and 2012 was not statistically significant(P>0.05). Conclusions The main field feces come from cattle,and the main distribution of infected field feces is in channels and bottom-lands. Therefore,the management of cattle and treatment of field feces should be strengthened.