Studies From the Rockefeller Institute for Medical Research, 1916, Vol. 23 (Classic Reprint) - Hardcover
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Excerpt from Studies From the Rockefeller Institute for Medical Research, 1916, Vol. 23
About two years ago, Dr. Noguchi and I announced that cul tures of a very minute organism had been obtained which might be regarded as the possible microbic agent of epidemic poliomyelitis. The cultures were derived from the central nervous organs of human beings and monkeys who had had poliomyelitis. As evidence of the nature of the cultures it co'uld then be stated that experimental poliomyelitis had been produced in monkeys by inoculation of the cultures. We have recently confirmed this result in an interesting manner. The culture employed for inoculation had been isolated about eighteen months before and had gone through a number of generations in artificial mediums. It was cultivated finally in a mixture of ascitic fluid and broth, and the fluid carrying large num bers of the microorganisms - which are of extremely minute size was injected, in some cases intraspinally, in others intraperitoneally into rhesus monkeys. The injection produced no immediate effect; indeed, a single injection caused no effect whatever. But when the intraperitoneal and intraspinal injections were repeated three or four times, the animals developed paralysis, and the paralyzed animals showed the peculiar histologic changes of the central nervous system indicative Of poliomyelitis. In other words, these experiments Showed that a culture Of the microorganism mentioned, long removed from the nervous tissues, is capable of causing infection of monkeys, and that by this means the symptoms and lesions of epidemic polio myelitis are produced.
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