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Книга по требованию: Scientific Memoirs, Vol. 2 (Classic Reprint)

Товар № 11248370
Вес: 0.18 кг.
Год издания: 2015
Страниц: 108 Переплет: мягкая обложка
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Excerpt from Scientific Memoirs, Vol. 2

During the course of the past few weeks I have met with a series of phenomena in certain experiments on the subcutaneous injection of choleraic comma-bacilli into the bodies of guinea-pigs which appear to be sufficiently remarkable to merit special record. I propose, therefore, in the present paper to give a detailed account of these experiments and their results, along with a few brief notes regarding their apparent significance.

I. - Source of the material employed in the experiments.

The commas employed in all the experiments belonged to a series of cultivations originally derived from a case of cholera which was admitted into the Medical College Hospital on the 21st January 1886. A portion of a fresh evacuation was sent to me for examination on that day. It consisted of a brownish-grey, alkaline, watery fluid, and an abundant sediment of gelatinous, somewhat pinkish flocculi.

The examination of fresh preparations, made immediately on the arrival of the material, showed that it was crowded with schizomycete organisms of various forms. Commas were only present in very small numbers and constituted a very inconspicuous feature as compared with other forms.

In spite of this, however, a plate cultivation yielded what was practically a pure crop of commatous colonies. These were present in innumerable numbers, and the only other form of colonies recognisable were two or three consisting of a very large kind of micrococcus which was present as a conspicuous feature in the original material. This plate afforded the starting-point for a series of successive pure tube cultivations of the commas which were employed in the experiments.

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