On the influence of certain natural agents on the virulence of the tubercle-bacillus / by Arthur Ransome and Sheridan Delépine, received May 1, 1894.
- Ransome, Arthur.
- Date:
- [1894]
Licence: Public Domain Mark
Credit: On the influence of certain natural agents on the virulence of the tubercle-bacillus / by Arthur Ransome and Sheridan Delépine, received May 1, 1894. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![[From the Proceedings op the Royal Society, Vol. 56.] On the Influence of certain Natural Agents on the Viru- lence of the Tubercle-Bacillus. By Arthur Ransome, M.D., F.R.S., and Sheridan Delepine. Received May 1 1894. J ' Three years ago Dr. Ransome communicated to the Society the results of some experiments, carried out in concert with Professor Dreschfeld, of Owens College, « On certain conditions that modify the virulence of the bacillus of tubercle. The tendency of these researches was fco prove that fresh air and light, and a dry and sandy sub-soil, have a distinct influence in arresting the virulence of the tubercle-bacillus j that darkness some- what interferes with this disinfectant action; but that mere exposure to light, in otherwise bad sanitary conditions, does not destroy the virus. J ou^tlvfsU°Wing taWe giV6S reSUltS °f Similar exPeriments hY v . Table I. Experi- ment No. 3. 1. Rabbit inoculated in peritoneum with fresh sputum. Killed 55 days h „ -o ,.. a±ter- 8howed well-marked tuberculosis. 7. 2. Rabbit. Sputum exposed to light and air 45 days in June and July. Showed no tuberculosis after 86 days «• 3. Rabbit. Sputum exposed in air-shaft in dusk at the same time n bn°wed slight tuberculosis after 86 days. 11. 4. Guinea-pig The same sputum exposed at the same time, in air and light, inoculated under the skin. Showed no distinct tubercle in 80 days. 12. 5. Guinea-pig. Same methods, only in dusk. Showed advanced tuber- culosis in 80 days. 58. 6. Guinea-pig. Another sputum exposed in April for 16 days to little or days1' m ne8S- GaVG ^^arked tubercle after 42](https://iiif.wellcomecollection.org/image/b21454127_0003.jp2/full/800%2C/0/default.jpg)
