On the Usefulness of the Tuberculin Skin Test

Abstract
Tuberculin tests on groups of persons in various areas of the United States are reported. All tests were performed by the intracutaneous method employing 0.0001 mg of PPD tuberculin. In certain areas simultaneous tests with histoplasmin, blastomycin and coccidioidin were performed. The practical usefulness of the tuberculin test is stressed and a plea made for its more widespread and uniform employment.

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