title: A STUDY OF THE TOXICITY OF DIPHTHERIA BACILLI ISOLATED FROM IMMEDIATE CONTACTS.
abstract: The members of the community at large are not often sources of diphtheria infection and we must look elsewhere to find the factors of greatest danger. School children do not furnish the source of infection. These investigators point to convalescents and contacts as being the probable distributors of the virulent bacilli.
authors.forename: F W
authors.initials: FW
authors.lastname: Hachtel
authors.forename: M S
authors.initials: MS
authors.lastname: Bailey