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Excerpt from On Latent Infection and Subinfection, and on the Etiology of Hemochromatosis and Pernicious Anemia If it does happen that bacteria enter the circulation under ordinary conditions, all will agree that the more frequent regions of entrance are likely to be found, not so much in connection with the denser epithelial surface layers of the body, as in connection with the more deli cate mucosae of the respiratory and alimentary tracts. And it is to the latter of these that I shall more especially confine my attention. In connection with this aliment ary tract we have very definite evidence that here bacteria may penetrate the protective barrier of epithelial cells. Nay more, that they are constantly being taken into the system. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.