An Introduction to Practical Bacteriology Based Upon the Methods of Koch
An Introduction to Practical Bacteriology Based Upon the Methods of Koch
Edgar M Edgar March Crookshank
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In SYSTEMATIC AND DESCRIPTIVE. 143 of cholera nostras, and claimed at first to be identical with the comma-bacillus of Koch. They are now regarded as quite distinct, though, like the Spirillum of Asiatic Cholera, they quite recently have been shown to be also patho- genic. * Spirillum plicatile, Ehrenberg (Marsh- Spiro- chcete). Thin threads, 2*25 ^ in breadth, with numerous narrow windings, 1 10 125 /xlong, occur- ring also in spirulinar forms. The threads have primary and secondary windings ;... the former are in each example of equal size, but the latter are often irregular ; their ends are cut off bluntly, and they exhibit rapid movement. They occur abundantly in marsh-water in summer, and can be obtained by allowing algae to decompose in water. On culti- vation the threads break up into long rods, short rods, and finally cocci. This change is rendered visible by making cover-glass-preparations, and staining with aniline dyes. Spirillum Obermeieri (Spirochcete Obermeieri Cohn : Spirillum of Relapsing Fever).
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