Surveillance After Elimination of Filariasis in Sichuan Province

Objective To understand the variation trend of filariasis and chronic filariasis patients after the elimination of filariasis in Sichuan and evaluate the long-term effects.Methods Monitoring on cyclical and focused population in the late of prevention and control were conducted in potential weak links;the chronic filariasis patients were monitored and investigated by general survey andre.Results Cyclical surveillance was carried out on 43 757 persons and 3 710 focused persons,with no found of microfilaria.There were 6 309 mosquitoes dissected and none of them was infectioned by microfilariae.General survey was carried out on 310 378 persons aged 10 years,and no new chronic filariasis patients was found.Chronic filariasis patients were decreased because of natural attrition with the natrual reducing rate of 62.32%.However,there were still 341 cases of chronic filariasis in Sichuan.Co nclusion After the elimination of filariasis in Sichuan,endogenous source of infection is not detected under the available blood tests technical methods.The result shows that the long-term effects of consolidation and purification conducted before the elimination of filariasis are significant.The post-surveillance should emphasize the monitoring of ectogenic source of infection and giving more care to chronic filariasis patients.