ABSTRACT
Objective To evaluate the cost-benefit of netting cultivation to block the spread of Oncomelania snails in lake re-gions. Methods The cost-benefit of netting cultivation was investigated by interviewing in the field,the cost of Oncomelania snail survey and control was investigated by retrospective review in Gaoyou Lake regions of Jinhu County from 2009 to 2011. The benefit of netting cultivation to block the spread of snails in lake regions was calculated by the benefit-cost ratio(BCR),and then the cost-benefit of them was calculated. Results The area of netting cultivation in Gaoyou Lake regions was 70.77 hm2,the aver-age cost of netting cultivation was 495 595 yuan every year,the average income was 962 000 yuan every year,and the average ben-efit of netting cultivation was 466 405 yuan. The average cost of Oncomelania snail survey and control from 2009 to 2011 was 85 047.87 yuan in Gaoyou Lake regions. The ratio of cost-benefit was 1.11∶1. The benefit was more than the cost. Conclusion There is a well benefit in lake regions during blocking the spread of snails by netting cultivation.
ABSTRACT
Objective To evaluate the effect of integrated control measures on soil-transmitted nematodiasis so as to provide the evidence for formulating the appropriate control strategies and measures in Jinhu County,Jiangsu Province. Methods Since 1995,the comprehensive control measures were carried out for soil-transmitted nematodiasis,and the measures included deworm-ing,health education,safe water,sanitation and environmental remediation. The effects of the comprehensive control measures were evaluated by the investigations of the prevalence of soil-transmitted nematodiasis,awareness of health knowledge,and behav-iors of residents. Results From 1995 to 2012,646 437 person-times were administrated in deworming medication with 2.48 times per capita;the benefit rate of safe water was 97.90%;the popularity rate of harmless toilets was 86.89%. The awareness rate of health knowledge increased from 54.05%in 1996 to 95.60%in 2012,the difference between them were statistically significant (χ2=230.92,P<0.01);the rate of correct health behaviors increased from 59.07%in 1996 to 96.40%in 2012,the difference between them had statistical significance(χ2=202.69,P<0.01). The prevalence of soil-transmitted nematodiasis decreased from 62.57%in 1989 to 1.21%in 2012,the difference had statistical significance(χ2=1 016.92,P<0.01). The infection rates of Asca-ris lumbricodes,hookworm and Trichuris trichiura were 0.58%,1.12%and 0,respectively in 2012,and compared with the rates of those infections in 1989,the decline rates were 94.96%,97.28%and 100%respectively,the differences between them were sta-tistically significant(χ2A sc aris =129.50,χ2hookworm=544.62,χ2Tri ch uris =254.19,all P<0.01). Conclusion The comprehensive control strategies and measures are effective and soil-transmitted nematodiasis has been controlled in Jinhu County.