Abstract
One hundred four children with a positive tuberculin reaction measuring at least 5 mm in diameter of induration were retested with Old Tuberculin solution and the skin test antigens of the photochromogens, scotochromogens, and the nonchromogenic group. In only seven instances could it be justifiably concluded that no tuberculous infection existed. Further testing with PPD-S and PPD-B apparently ruled out tuberculous infection in 17 other patients. It appears that tuberculosis is the major cause of a positive tuberculin reaction in the Richmond area, but infection with one of the mycobacteria (photochromogens, scotochromogens, and nonchromogens) may also be a cause of a positive tuberculin reaction measuring less than 10 mm in diameter of induration.
- Copyright © 1962 by the American Academy of Pediatrics
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