Discussion Despite the general awareness of the signifi¬ cance of the tuberculin conversion,
there re¬ mains some doubt concerning the procedures that should be followed when a …

In all Canadian provinces, a small proportion of the population is regularly followed up by
the tuberculosis services, usually at annual intervals. They include mainly persons who had …

Incidence is one of the epidemiological factors in pulmonary tuber culosis upon which there
has never been agreement, and which has naturally created a good deal of interest and …

The importance of roentgenological examinations of the chest for the dis covery of
pulmonary tuberculosis in supposedly healthy individuals is now undisputed. It seems …

Because of the existence of tuberculosis in some of the patients who are admitted to general
hospitals for other conditions, they constitute a population group of considerable importance …

It is generally recognized that the extent of tuberculous pulmonary disease which is seen on
the roentgenogram does not always correspond closely to the extent of disease which is …

Despite repeated injections of tuberculin, a subject who is not or has never been infected
with tubercle bacilli will not usually exhibit a positive response. A negative tuberculin skin …

It is proposed in this paper to evaluate the usefulness and the limitations of mass
roentgenographic surveys of apparently healthy groups of the population as an instrument of …

Case 1: C. 150, Indian male, aged nineteen years, shop assistant. He was treated by
artificial pneumothorax on the left side in 1936 for unilateral pulmonary tuberculosis. This …

Eight hundred and fifty-four patients of 928 who had attended a mass radiographic
tuberculosis survey and in whom the diagnosis of non-tuberculous lung disease had been …