标题：Quality control of laboratory investigations on Schistosoma mansoni in St Lucia, West Indies: Maintenance of artificial prevalence as a laboratory aid
摘要：A method is described of maintaining an apparent S. mansoni prevalence rate of 10% in an area estimated to have a natural rate of below 5% following two chemotherapy campaigns. To sustain interest and therefore accuracy among microscopists engaged on screening, known S. mansoni -positive stools were seeded, without their knowledge, among those collected in the field. The problems of achieving a desired level of seeding, and of a possible further dimension of the scheme are discussed. 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 (229K), or click on a page image below to browse page by page. 655 656
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