FOCAL INFECTION IN DERMATOLOGY

Abstract
The purpose of this paper is to review briefly the general subject of focal infection, to discuss some of the newer concepts and to indicate the rôle that focal infection plays in the etiology of disorders of the skin. The term focal infection as employed will convey the meaning which Billings1 expressed, namely, "a dissemination of bacteria and toxic products from the focus of infection." While the theory of focal infection has been widely discussed for years,2 many persons belittle its significance and the dermatologist has been slow in availing himself of the knowledge at his disposal, if one is to judge from the meager discussion on focal infection found in most of the dermatologic textbooks and from the inadequate histories of cases as reported in current dermatologic literature. SOURCES OF FOCAL INFECTION The following outline lists the many areas in which infectious foci may be located and

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