The life-history of Bacterium termo and Micrococcus : with further observations on Bacillus / by J. Cossar Ewart ; communicated by Professor Huxley.

  • Ewart, J. C. (James Cossar), 1851-1933.
Date:
1878
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Licence: Public Domain Mark

Credit: The life-history of Bacterium termo and Micrococcus : with further observations on Bacillus / by J. Cossar Ewart ; communicated by Professor Huxley. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    [From the Proceedings of the Royal Society, No. 188, 1878.] “ The Life-History of Bacterium termo and Micrococcus, with further Observations on Bacillus.” By J. COSSAR Ewart, M.D. Edin., University College, London. Com- municated by Professor Huxley, Sec. R.S. Received June 20, 1878. [Plate 10.] While recently studying the phases through which the now familiar organism Bacillus anthracis passes, my attention was often directed to two still more familiar organisms, Bacterium termo and MicrococciLs. Frequently from cultivations of Bacillus both rods, spores, and fila- ments disappeared, and in their place millions of Micrococci and the short-jointed rods of B. termo were found.* In the short rods of B. termo, which in the struggle for existence overcame the less active Bacilli, minute bright particles were often present. These exactly re- sembled the Micrococci in the field around and between them, and were evidently the remains of spores' out of which the rods had just been developed. The presence of Micrococcus-like spores in the short rods * This disappearance of tho one and appearance of the others accounts for early investigators believing that there was a continuity of development between Bacilli and septic organisms.