The opinions recently expressed by Koch on the modes of infection in typhoid fever are being made the basis of action in several parts of the German Empire, and the various inquiries that have been set on foot at Koch's instigation seem likely to shed light on some of the obscurer problems relating to the dissemination of typhoid fever among both urban and rural communities.
One of the most recent studies of this character is by Dönitz,1 and treats of an investigation into the origin of the 122 cases of typhoid fever that were reported in Berlin between Oct. 20, 1902, and June 30, 1903. Eighteen of this number were rejected on the ground of questionable or mistaken diagnosis, and 21 were excluded as being imported cases. Of the remaining 83, 37 could be ascribed to definite causes, namely, 18 to contact infection, 6 to water infection (bathing), 3
SOURCES OF INFECTION IN TYPHOID FEVER.. JAMA. 1904;XLII(24):1563. doi:10.1001/jama.1904.02490690031005
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