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March 23, 1946

PENETRATION OF PENICILLIN INTO FOCI OF INFECTION

Author Affiliations

New York

From the First Medical Service and the Division of Bacteriology Laboratories of the Mount Sinai Hospital.

JAMA. 1946;130(12):761-764. doi:10.1001/jama.1946.02870120007002
Abstract

The control of infection by penicillin is generally acknowledged to be dependent on the susceptibility of the bacterial species, the relative resistance of the strain responsible for the infection and the duration of its exposure to a therapeutically effective concentration.1 To these three factors we would add a fourth, the attainment of a concentration in the blood sufficiently high to secure penetration into dense inflammatory foci in which bacteria are embedded. Very much higher blood levels are necessary to obtain this objective than for simple sterilization of the blood stream.

In order to facilitate the penetration of chemotherapeutic agents into the vegetations of subacute bacterial endocarditis, some clinicians2 have heparinized their patients. It is doubtful whether the prolongation of the coagulation time of the blood to thirty or sixty minutes has any appreciable effect on the masses of blood platelets and fibrin of which the vegetations of subacute bacterial

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