ABSTRACT
Objective To evaluate the detection rate and the efficiency of the modified crushing-cercariae escaping method.Methods The detection rates of the modified crushing-cercariae escaping method and the crushing methods were compared by using a double-blind control experiment with the latter as a gold standard.meanwhile the number of the cercariae was quantified.The efficiency of the two methods aforementioned and the cereariae escaping method were compared in field.Results The detection rate of the modified crushing-cercariae escaping method was 100%.the average number of cercariae in each infected snail was (4 778±1 157);and the number in certain volume of water sample was positively correlated with the number of infected snails.The efficiency of the modified menthed Was 18.2 times and 17.3 times as high as those of the crushing method and cereariae escaping method,respectively.Conclusions The modified crushing-cercariae escaping method Can detect the infected snails quicky and Can quantify the number of infected snails and cercariae,and is suitable for the detection of infected snails in large number.
ABSTRACT
According to the National Scheme of Shistosomiasis Surveillance,the endemic situation in 8 national surveillance sites in Jingzhou City were monitored and analyzed.The results showed that the average human infection rate in 8 sites was 0.93%,and the rates in residents above 40 years old were high.People with positive results in fecal examination were all farmers,with an infection rate of 1.16%.The average infection rate of cattle was 6.26%.The total snail area was 1 511.50 hm~2,among which an area of 0.98 hm~2 was newly discovered and the area with infected snails was 1.17 hm~2.It concludes that the endemie situation in surveillance sites decreases year by year.However,the infection rate of earle still remains high and the snail status is still severe,which suggests that the control should be strengthened further.
ABSTRACT
The data of 162 cases with acute schistosomiasis in Jingzhou City from 2004 to 2008 was analyzed, and the resultsshowed that the endemic situation of acute schistosomiasis decreased year by year, and the children aged 5-14 years were themain infection population, and swimming and playing in water was the main infection mode. It is suggested that health educationfor residents especially students should be strengthened to improve their conscious for disease prevention.
ABSTRACT
Objective To evaluate the anti-schistosomiasis effect of World Bank loan for schistosomiasis control project 1992-2001 in Jingzhou City, Hubei Province, and observe the endemic situation after two years of the end of the project.Methods By a retrospective longitudinal survey, information from annual reports was collected, which included disease screening, treatment and extended chemotherapy for human population and livestock, the distribution of Oncomelania hupensis and health education information from eight counties in Jinzhou prefecture from 1992 to 2003.Statistical u test was used for phased retrospective dynamic analysis.Results In the year 2001, schistosomiasis patients(77 009 cases)were 45.2% less than that of 1992(140 438 cases), The number of acute and advanced cases(63 and 1 032 cases, respectively)was 74.2% and 43.9% less than those of 1992(244 and 1 841 cases, respectively).The average infection rate among residents was also reduced from 7.8% of 1992 to 4.7%(u=28.864, P