That typhoid fever is endemic in institutions is generally accepted as a fact. That it is occasionally epidemic is a fact. It is also a fact that the source of infection is usually hard to find and frequently is not found.
The presence of a case of typhoid in this institution caused a general search for the origin of the infection, but it was not found. The case occurred in a building occupied for the most part by aged and demented patients. The routine biweekly examination of water and milk gave negative results, as before.
Inasmuch as the best way of dealing with typhoid epidemics is to prevent their occurrence, it was suggested by the superintendent (Dr. H. W. Mitchell) that all patients not over 50 years of age should be immunized.
The bacterin was made from a culture sent me through the kindness of Major F. F. Russell, U.
WESTON PG. THE IMMUNIZATION AGAINST TYPHOID OF EIGHT HUNDRED AND NINETY-EIGHT PATIENTS IN AN INSTITUTION: WITH DESCRIPTION OF THE TECHNIC EMPLOYED. JAMA. 1912;LIX(17):1536–1537. doi:10.1001/jama.1912.04270100304014
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