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Objective To investigate the correlation between the source of Schistosoma japonicum infections and sociological factors among mobile populations in Haining City, so as to provide insights into the management of schistosomiasis among mobile populations in Haining City. Methods A total of 12 villages were randomly sampled from 8 townships and 4 subdistricts in Haining City. The mobile populations from schistosomiasis-endemic areas were detected for S. japonicum infections using serological tests. In addition, the awareness of schistosomiasis prevention and control knowledge was investigated using a questionnaire survey. Results A total of 1 019 mobile populations were investigated in 12 villages from Haining City, and 23 sero-positives were found, with a positive rate of 2.26%; however, no egg-positives were detected. Logistic regression analysis showed that the mobile populations with original occupations of aquaculture and husbandry were more likely to be sero-positive. The mobile populations had an overall low awareness rate of schistosomiasis prevention and control knowledge, and a higher rate was seen in sero-positive than in sero-negatives. Conclusions The mobile populations with original occupations of aquaculture and husbandry were the key for the surveillance of source of S. japonicum infections. The health education should be intensified to improve the awareness of schistosomiasis prevention and control knowledge among mobile populations.
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Objective To investigate the correlation between the source of Schistosoma japonicum infections and sociological factors among mobile populations in Haining City, so as to provide insights into the management of schistosomiasis among mobile populations in Haining City. Methods A total of 12 villages were randomly sampled from 8 townships and 4 subdistricts in Haining City. The mobile populations from schistosomiasis-endemic areas were detected for S. japonicum infections using serological tests. In addition, the awareness of schistosomiasis prevention and control knowledge was investigated using a questionnaire survey. Results A total of 1 019 mobile populations were investigated in 12 villages from Haining City, and 23 sero-positives were found, with a positive rate of 2.26%; however, no egg-positives were detected. Logistic regression analysis showed that the mobile populations with original occupations of aquaculture and husbandry were more likely to be sero-positive. The mobile populations had an overall low awareness rate of schistosomiasis prevention and control knowledge, and a higher rate was seen in sero-positive than in sero-negatives. Conclusions The mobile populations with original occupations of aquaculture and husbandry were the key for the surveillance of source of S. japonicum infections. The health education should be intensified to improve the awareness of schistosomiasis prevention and control knowledge among mobile populations.
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Objective To understand the risk situation of imported schistosomiasis and its main influencing factors in Shang-hai City from 2005 to 2015. Methods A retrospective survey was performed,and the database was established based on the da-ta collection of imported schistosomiasis,Oncomelania hupensis snail situation and mobile population in Shanghai City from 2005 to 2015. Results From 2005 to 2015,the mobile population in Shanghai City increased by 123.92％,which reached about 9816500,and 54.70％of them were located in the inner suburban districts. The accumulated areas with snails of 7.13 hm2 were found in 16 towns of 4 outer suburbs(excluding Chongming District). A total of 23 cases of imported schistosomiasis were found in Shanghai City,and the number of the imported schistosomiasis cases was on the downward trend(rs=-0.782,P=0.004). From 2005 to 2009,11 out of 13 imported schistosomiasis cases(84.62％)were distributed in the inner suburban dis-tricts where no O. hupensis snails were found at the same time. From 2010 to 2015,9 out of 10 imported schistosomiasis cases (90％)were distributed in the outer suburban districts where O. hupensis snails were found at the same time. Conclusion The number of imported schistosomiasis cases in Shanghai is on the downward trend. However,the threat of imported schistosomiasis to the prevention and control of schistosomiasis in Shanghai City should not be ignored.
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In order to understand the distribution of schistosomiasis in mobile population in Guangxi zhuang Autonomous Region, field investigation was conducted in 19 endemic villages selected by cluster sampling. The mobile people who were older than 3 years old were investigated by questionnaire and indirect hemagglutination( IHA) , then the IHA-positive ones were detected by fecal examination. Meanwhile, a snail survey was carried out. The results showed that a total of 2 866 people were investigated , among which 1 380 came from 143 endemic areas. A total of 2 428 people were involved in IHA examination with a positive rate of 3.46% , and the rate of people from endemic areas were significantly higher than that of ones from non-endemic areas( P < 0.01). Sixty people were involved in fecal examination, and the results were all negative. An area of 899. 3 hm~2 was surveyed, and the snail area was 4.97 hm~2, while none of positive snails were found. It is suggested that the mobile population is the main risk factor for potential schistosomiasis transmission in Guangxi, and the surveillance on this population should be strengthened.
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The historical surveillance results showed, there were 10 schistosomiasis cases in Huangshan City from 1994 to 2006. The survey in 2007 showed, the positive rates of blood examination for schistosomiasis in migrant workers and immigrant workers were 0.49% and 0.47% , respectively, but no schistosome-infected patients were detected by using the stool examination. An area with snails of 3 000 m~2 was found in the residence of the immigrant workers, but no infected snails were found. It is indicated that the mobile population has some impact on the transmission of schistosomiasis in the transmission-interrupted area. The surveillance and health education for the mobile population should be strengthened, and the imported infectious source should be prevented.
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The malaria annual reports, epidemic situation reports, case investigation reports and blood examination data for febrile patients from 2003 to 2007 in Nantong City were analysed, so as to provide the scientific evidence for the measures of malaria control. The results suggested that mobile population was the key point of malaria control in Nantong City, and the main control measures should put emphasis on epidemic situation supervision of mobile population and surveillance on febrile patients.
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Objective To analyze the effect of malaria surveillance and evaluate the surveillance measure in Guangxi Zhuang Autonomous Region from 1995 to 2004 so as to provide scientific basis for formulating control strategy at the late-stage of malaria control. Methods The data on blood smear examination of febrile patients among local residents, focus residents and mobile population in 92 counties from 1995 to 2004 were collected,described and analyzed. Results The totals of 10920395,427600,246159 and 253530 slides in local residents,focus residents, returned population and endemic population were examined. The average positive rates of blood examination were 0.009%,0.079%,1.386% and 0.324%,respectively. The indigenous cases and imported cases accounted for 23.29% (1285/5517) and 76.71% (4232/5517) of the total malaria cases respectively. Conclusions The malaria incidence in Guangxi Zhuang Autonomous Region has been under 1/10000 for 17 years. There is less indigenous malaria in Guangxi. The imported malaria cases are dominated and scattered in whole Region. The secondary cases of imported malaria is very low. The results show that the present surveillance system and control programs are effective for monitoring the epidemic situation of malaria.
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Objective To understand the potential risk for schistosomiasis transmission caused by introduction of infection source from mobile population in Shanghai. Methods Field investigation was conducted in the suburb of Shanghai City by screening the mobile population living in Shanghai for more than 1 month and over 1 years old in a procedure of interviewing, serum indirect hemagglutination (IHA) test, and then fecal examination to detect the eggs with nylon sedimentation approach for those IHA positives. Results Among 2 931 mobile people investigated, 1 575 were male (53.74%) and 1 356 were female(46.26%); 138 out of 2 931 were positive in IHA test (4.71%). 1 938 (66.12%) out of 2 931 came from Schistosoma japonicum-endemic provinces and its positive rate in mobile population (5.99%) was significantly higher than those from the transmission-interrupted provinces (2.6%) (?2=10.28, P