PEDIATRICS Vol. 39 No. 2 February 1967, pp. 311
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Letters to the Editor

EDWARD M. SEWELL M.D.1

1 Chairman, Section on Diseases of the Chest

Dr. Arnhold expresses a need that we have all felt. As our knowledge of atypical mycobacteria grows, the question of the specificity of the tuberculin reaction frequently comes up. At these times testing with separate antigens for the various mycobacteria may be helpful.

In the American Academy of Pediatrics the need for a commercial source for these antigens was discussed by the Executive Committee of the Section on Diseases of the Chest in October 1965.