摘要：On a sugar estate in northern Tanzania, an integrated control programme against Schistosoma mansoni was carried out during the three years 1968-70 inclusive. The costs of that programme are defined, the costs of future snail control in the same area are estimated, and an attempt is made to evaluate the cost—benefit ratio of schistosomiasis control in the estate. The total expenditure on snail control was US $23 538, of which US $17 371 was spent on molluscicides and US $5 135 on labour. This represents an annual expenditure of approximately US $1.31 per estate resident. In the mass diagnosis and treatment campaign the main items in the total expenditure of US $37 043 were labour (US $13 724), drugs (US $4 218), hospital charges (US $8 262), and lost working days (US $8 760). It is estimated that the recurrent annual expenditure necessary to keep S. mansoni at a low level in the future would be US $7 714 on snail control and US $1 832 on detecting and treating new cases; however, the institution of a snail control programme would reduce the need for chemotherapy and would result in recurrent annual savings of US $7 448. In addition, it was estimated from a productivity study that savings of about US $14 000 per year could result if treatment of infected workers raised productivity by 5%. The goodwill that resulted from the protection of wives and children against schistosomiasis would be a further benefit. When all factors are taken into account, snail control appears to be a feasible economic proposition. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (781K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 573 574 575 576 577 578
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