A half century of living under the tutelage of Pasteur and his successors has taught us that most disease is caused by " deadly " bacteria* and has inspired a healthy fear of the teeming microbe world. It may come as a surprise to many to find that the "pathogenic" (disease-producing) germs are relatively few in number, and their influence is far outweighed by the " good germs," whose action is not only beneficent but even essential to the maintenance of the human species. Dr. Arthur I. Kendall, professor of bacteriology, Dean...
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