Many of the difficulties encountered by those engaged in public health work arise from the failure of many practitioners to realize the significance of certain facts that are matters of common knowledge to laboratory workers. The following paper is based on an analysis of the examinations of throat cultures at the bacteriologic laboratory of the Indiana State Board of Health. The facts presented are not essentially new, but because of their importance in public health work their rehearsal is thought to be warranted.
The total number of throat cultures examined for diphtheria bacilli during the year ending Oct. 31, 1910, was 2,288. Of these, 024, or 27.2 per cent., were positive.
The influence of school attendance on the incidence of diphtheria in this state is quite marked. Smith's report1 to the London County Council in 1896 showed that the greatest incidence of this disease in England and Wales was among
SIMONDS JP. DIPHTHERIA IN ITS RELATION TO PUBLIC HEALTH. JAMA. 1911;LVI(1):37–38. doi:10.1001/jama.1911.02560010039013
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