Title: Growth and Decline Trend of Oncomelania in Jinhu County,1998-2012
Abstract: Objective To study the growth and decline of oncomelania and associated factors after transmissionblocking in Jinhu county,Jiangsu province,and to explore the control strategies hereafter. Methods Systematic sampling method and environmental sampling method were both employed to monitor and check the oncomelania in history oncomelania-infected area and suspected environment,with frame spacing of 5 m in inland and10-20 m on lakeshore.The captured oncomelania were conducted anatomical observation with crushing-microscopic examination to check the infection of schistosome. Netting method and straw curtain trapping method were both adopted for monitoring of oncomelania spreading.Results During 1998-2012,43 432 work days were spent,a total area of 23 991. 48 hm2 were investigated,2 769 271 frames were checked,with 8 plots of land inhabited by oncomelania and the area ranging within 0-15. 43 hm2.One village containing 4 plots of land was found with oncomelania,with a total area of 28. 18 hm2.The occurrence rate of the new-found frames with oncomelania was higher than that in recurrented frames( χ2= 9. 64,P0. 01).Altogether 3885 oncomelania were dissected,with no infected.A total weight of 5972 kg flotage was dragged up from water and 560 straw curtains were released,with no oncomelania discovered. Conclusion The epidemic of oncomelania in Jinhu county is fluctuating from time to time and oncomelania in villages still exits.Thus,control of oncomelania in Jinhu county is a major task for prevention and control of schistosome.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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