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This is another attempt to establish a possible relationship between a particular group of bacteria and influenza. The authors' conclusions are recorded in thirty-eight items in the summary. In brief, it is asserted that material transferred from human cases of "influenza" has produced an influenzalike disease in monkeys; that pure cultures of Pfeiffer's bacillus and B. pneumosintes will not produce such a condition; that an acute infection of the upper respiratory tract resembling influenza has been induced by the use of cultures of a pleomorphic "hemophilic" streptococcus isolated from the blood of a human case of "influenza"; that "rough" colonies of this organism are more virulent than "smooth" colonies; and, finally, that the pleomorphic streptococci studied were "not improbably... etiologically related to the influenza outbreak in Chicago in the winter of 1928-1929." Proper evaluation of the experimental data is difficult, partly because of the enormous amount of material and partly
Experiments on the Etiology of the Influenza Epidemic of 1928-1929. JAMA. 1931;97(14):1025. doi:10.1001/jama.1931.02730140061035
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