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Evaluation of pilot control trial of intestinal schistosomiasis in the Finchaa Sugar Estate, Ethiopia.

Intestinal schistosomiasis is undergoing a rapid increase in magnitude in Finchaa Sugar Estate in Ethiopia. A pilot control trial of intestinal schistosomiasis was instituted in 1995 to reduce the magnitude of the disease and introduce sustainable schistosomiasis control approaches in the Sugar Estate. Following initial parasitological survey of all the camps in the Sugar Project area in 1995 using Kato method, mass chemotherapy of the heavily infected residents of Camp 7 and selective treatment of lightly infected residents of other camps were made using praziquantel. Endod (type 44) was applied to transmission sites along Fekerie stream in Camp 7 on quarterly basis whenever Biomphalaria pfeifferi was detected. Other inputs to the project as parts of capacity building included transplantation of Endod cuttings (type 44), training and health education. Cross sectional parasitological surveys were made in 1998 to assess the impact of the pilot control trial. The results of stool examination showed that the prevalence of schistosomiasis was reduced from 30% in 1995 to 26% in 1998 among residents of Camp 7 and the intensity of infection from 198 eggs per gram of feces (EPG) in 1995 to 85 EPG in 1998. Similarly, the prevalence of infection among children in Finchaa Valley Elementary School was reduced from 78% in 1994 to 56% in 1998 and the reduction in respective intensity of infection was from 283 EPG to 114 EPG. Although significant reduction in the magnitude of the disease was not achieved, the control activities were taken over by the Sugar Project Polyclinic to ensure sustainability. In addition to chemotherapy and snail control using Endod, other disease non-specific methods such as health education should be used to get maximum benefit from such facilities as latrines, and ensure participation of the community in order to sustain the control activities.