OBSERVATIONS ON THE DIPHTHERIA VIRULENCE TEST IN PUBLIC HEALTH WORK.
These authors advocate tonsilectomy where virulent diphtheria bacilli persist in throats with adenoids or enlarged tonsils. Diphtheria bacilli of well persons are rarely virulent unless these persons have associated with cases of diphtheria. Organisms are almost always virulent in persons sick with the disease and their associates.
Wade
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Vaughan
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