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Article in Chinese | WPRIM | ID: wpr-665522


Objective To evaluate the effect of the water conservancy schistosomiasis control projects combined with mollus-cicide to control Oncomelania hupensis snails in the rivers connecting with the Yangtze River. Methods The water conservancy schistosomiasis control projects of Zhujiashan River,Qili River and Gaowang River were chosen as the study objects in Pukou District,Nanjing City. The data review method and field investigation were used to evaluate the effect of the water conservancy schistosomiasis control projects combined with molluscicide to control O. hupensis snails. Results After the projects of the wa-ter level control and concrete slope protection and mollusciciding were implemented,the snails in the project river sections were completely eliminated. The snail diffusion did not happen in the inland irrigation area too. In the outside of the river beach , though the snails still existed,the snail densities plunged below 1.0 snail per 1.0 m2. Conclusion The comprehensive mea-sures of the combination of water level control,concrete slope protection and mollusciciding can effectively control and eliminate the snails,and prevent the snails from spreading.

Article in Chinese | WPRIM | ID: wpr-665510


Objective To investigate the status of Cryptosporidium infection in the population in Nanjing City so as to pro-vide the evidence for the prevention and control of cryptosporidiosis. Methods A total of 100 fecal samples were collected from each of three districts(Liuhe,Qixia and Gaochun)and one hospital(Nanjing Zhongda Hospital)in 2015 and 2016 respective-ly. The fecal samples were detected for Cryptosporidium with microscopy(by using the gold amine phenol-modified acid-fast staining)and the positive samples were detected again for the molecular biology confirming by using the fluorescence quantita-tive PCR. Results During the two years,581 cases of normal population who lived in the city were surveyed and no Cryptospo-ridium infection was found. Among 202 cases of outpatients with chronic diarrhea,there were 9 Cryptosporidium positive cases with the microscope scanning method (4.46%),and among the 9 cases,7 cases showed obvious logarithmic amplification curves showing positive Cryptosporidium nucleic acid,but 2 cases without the obvious logarithmic amplification curves,and the Cryptosporidium nucleic acid positive rate was 3.47%. Conclusions Cryptosporidium infection is not found in the normal popu-lation of Nanjing City,but the Cryptosporidium infection is found in the chronic diarrhea patients. The results imply that we should strengthen the detection of Cryptosporidium in the chronic diarrhea patients,so as to provide the evidence for improving the diagnosis and treatment of cryptosporidiosis.