Abstract
As we have observed in it our field studies, pellagra has spread most readily in communities in which unscreened surface privies were in use. In those portions of the city of Spartanburg, South Carolina, equipped with a water-carriage system of sewage disposal, new cases of pellagra were relatively few. In two mill villages completely equipped with a water carriage sewer system, it was impossible to find cases of pellagra which had certainly originated there. Individuals suffering from pellagra contracted elsewhere were not lacking in these communities.
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