In 1900 the Massachusetts Association of Boards of Health appointed a committee to consider the question of the presence of diphtheria bacilli in well persons as ordinarily understood so far as the throat and nose are concerned. The report of this committee is just at hand.1 Without considering certain questions connected with the morphological appearances that are considered as characteristic of the bacillus of diphtheria, suffice it to say that as regards the prevalence of the diphtheria bacillus in well persons the committee feels justified in the statement that in cities at least 1 to 2 per cent. of well persons among the general public are the carriers of certain types of bacilli. Furthermore, that where well persons are exposed to diphtheria, as in families, schools or institutions, the number of well persons harboring bacilli may range from 8 to 50 per cent. From animal and other experiments it
DIPHTHERIA BACILLI IN WELL PERSONS. JAMA. 1902;XXXIX(11):633–634. doi:10.1001/jama.1902.02480370041005
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