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P. C.
Ann Intern Med. 1939;13(6):1089-1093. doi:10.7326/0003-4819-13-6-1089
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This excerpt has been provided in the absence of an abstract.

Recent investigations have aroused great interest among bacteriologists in the so-called pleuropneumonia group of organisms. Study of this group has been relatively neglected, partly because of technical difficulties in maintaining cultures and partly because it has not been known to be important as a cause of disease in man.

The first known species of this group of organisms was isolated by Nocard in 1898 from the lungs and pleural exudates of cattle dying of pleuropneumonia. He first obtained his cultures by growing the organisms within collodion sacs inserted into the peritoneal cavity of rabbits. Later he obtained them also in


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