As defined by the American Sanatorium Association at its meeting in Atlantic City, May 27, 1929, the term childhood type of tuberculosis is used to designate the diffuse and focal lesions in the lungs and adjacent tracheobronchial nodes that result from the first infection of the pulmonary tissue by the tubercle bacillus. At the Lymanhurst School for Tuberculous Children in Minneapolis, where about 8,000 children have been examined to date, an unusual opportunity is afforded to study this condition on a rather extensive scale. This report is based on a survey of 5,816 Lymanhurst cases, (tables 1 and 2) in which 3,981 (68.4 per cent) children gave a negative reaction to the Pirquet test, while 1,835 (31.6 per cent) gave a positive reaction to the tuberculin test.
The investigation to which each child was submitted included a complete physical examination, stereoscopic films of the lungs, Pirquet tests and determinations of