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Article
February 6, 1909

THE DURATION OF THE ACTIVELY INFECTIOUS STAGE OF TUBERCULOSIS

Author Affiliations

PHILADELPHIA

JAMA. 1909;LII(6):449-455. doi:10.1001/jama.1909.25420320021002c
Abstract

The object of this study has been primarily to render a rich field of tuberculous material of practical value from both the clinical and laboratory viewpoints. Scant benefit accrues to humanity at large from scientific knowledge that can not be applied to its betterment or protection. We have endeavored through scrutiny of the secretions and excretions of tuberculous subjects to arrive at definite conclusions: 1, with regard to the possibility of transmitting the disease during its earliest stages; 2, as to what means, and through what media, infection of human beings by other individuals may and does occur; and, 3, as to how far and how thoroughly under the ordinary circumstances of daily life Nature provides for the destruction of infectious tuberculous material, subsequent to its excretion from the human body.

It has been, and as the result of this investigation still more certainly is, our conviction that tuberculous infection

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