Public health application of a serological test for tuberculosis: Study of the incidence of inapparent infections among the employees of an Alsatian supermarket

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Abstract
A serodiagnostic test based on antigen 60 has been used to analyse the presence of IgG antibodies specific for mycobacteria, in the serum of the employees of a food supermarket. More than fourteen percent of the employees were seropositive, compared to 1.5% in a healthy adult population. The seropositives were restricted to those employees who were in direct contact with the customers.