The Sources and Modes of Infection (Classic Reprint) - Softcover

Chapin, Charles V.

9781332198337: The Sources and Modes of Infection (Classic Reprint)

Softcover

ISBN 10: 1332198333 ISBN 13: 9781332198337

Verlag: Forgotten Books, 2018

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Excerpt from The Sources and Modes of Infection

We need to measure more carefully the relative importance of different sources of disease and different modes of infec tion. It is not so important to know that typhoid bacilli live in water for weeks, as it is to know that 99 per cent die in one week. It is not enough to discover that diphtheria bacilli can be recovered from articles in the sick-room; we must learn how often they are found and how often disease is traced to such a source. We have for years been much alarmed because tubercle bacilli are found in milk, but since a serious effort has been made to measure the actual danger, the alarm has greatly diminished. Doubtless the house ﬂy has been the cause of typhoid fever, but in what percentage of cases we are profoundly ignorant. Healthy carriers of diphtheria have certainly transmitted the disease to others, and we should earnestly try to determine the amount of diphtheria caused in this way. The attempt is made in the following pages to estimate roughly, with the very imperfect material now available, the relative importance of different factors in the extension of infectious diseases. The conclu sions must to a large extent be merely tentative, and as indicating lines for further study.

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.

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Rese�a del editor

Excerpt from The Sources and Modes of Infection

We need to measure more carefully the relative importance of different sources of disease and different modes of infec tion. It is not so important to know that typhoid bacilli live in water for weeks, as it is to know that 99 per cent die in one week. It is not enough to discover that diphtheria bacilli can be recovered from articles in the sick-room; we must learn how often they are found and how often disease is traced to such a source. We have for years been much alarmed because tubercle bacilli are found in milk, but since a serious effort has been made to measure the actual danger, the alarm has greatly diminished. Doubtless the house fly has been the cause of typhoid fever, but in what percentage of cases we are profoundly ignorant. Healthy carriers of diphtheria have certainly transmitted the disease to others, and we should earnestly try to determine the amount of diphtheria caused in this way. The attempt is made in the following pages to estimate roughly, with the very imperfect material now available, the relative importance of different factors in the extension of infectious diseases. The conclu sions must to a large extent be merely tentative, and as indicating lines for further study.

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.

Rese�a del editor

Excerpt from The Sources and Modes of Infection

This volume is intended to indicate the principles which should guide sanitary practice, and to show how recent laboratory work and the epidemiological study of disease have modified these principles. When I began work as health officer in 1884 the filth theory was still in favor, and it was generally believed that the germs of disease commonly grew in decaying organic matter. Yet contagion was recognized as an important factor in the spread of disease, and the isolation of the sick was more and more insisted upon. Fifteen years ago probably most health officials believed that the contagious diseases could be completely stamped out if only all persons sick with them could be isolated. The air was thought to be the chief medium for their transmission, and fomites the mechanism for their passage from place to place. Sanitary practice was based on these premises.

My own views concerning these matters became greatly modified year by year, partly owing to the rapidly accumulating knowledge of bacteria and other disease-producing organisms, and partly owing to direct observations on the manner in which the infectious diseases are disseminated, and on the effect of preventive measures.

It now appears that the growth of disease germs outside of the body is not frequent enough to be an important factor in the causation of disease, but their growth in the body without causing sickness, their latency as it were, often for many months, is a factor of very great significance. We know now that direct contact with the sick, or with healthy carriers of disease germs, is an exceedingly frequent mode of transmission, and that infection by means of the air, or from infected articles, is not nearly as common as was formerly believed.

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.

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