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This book includes much fundamental information. The author strongly emphasizes the importance of the tuberculin test as a diagnostic agent. Different methods of administration are presented, and reading is advocated at seventy-two hours. In Norway at the age of about 40 or 45 years all persons have been infected with tubercle bacilli and therefore react to tuberculin. The incidence of infection in the earlier years of life is definitely lower than it was some years ago. Therefore the control methods apparently are protecting children against infection. However, it will require several decades before this improved condition will be seen in the older age groups. Tuberculosis among cattle has practically been eradicated from Norway.
The author believes that persons in whom tubercle bacilli are found only in the gastric contents but who do not cough or expectorate are not infectious. He does not believe that massive infections are important and states
Pulmonary Tuberculosis and Its Treatment. JAMA. 1948;136(6):430. doi:10.1001/jama.1948.02890230070027