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Article
August 9, 1890

THE INFLUENCE OF LOW TEMPERATURE ON THE SYMBIOSIS OF MICROORGANISMS WITH REFERENCE TO PNEUMONIA.Read in the Section of Stale Medicine at the Forty-first Annual Meeting of the American Medical Association, held in Nashville, Tenn., May 21, 1890.

Author Affiliations

ASSISTANT SURGEON U. S. MARINE-HOSPITAL SERVICE.

JAMA. 1890;XV(6):214-216. doi:10.1001/jama.1890.02410320016001e

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Abstract

It is a well established fact in bacteriology that a certain temperature range is requisite for the propagation of microörganisms, some of which may have a wide range of temperature, while others require a more limited degree, which can not be departed from without jeopardizing the life of the microörganism. The same may be said in a general way concerning their resistance to high temperature; some are killed at 50° C., while others live for a considerable time at a temperature over 100° C.

The bacteria, which are widely distributed, seldom exist alone, being usually associated with others, which constitutes the state of symbiosis. In this condition the bacteria exist and exert peculiar influence upon each other as to their manner of growth and individual virulency. A good example can be given showing the dependence upon each other of the different varieties of bacteria found in common garden earth, where

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