The book The Bacteriophage Its Rle in Immunity was written by author Felix D Herelle Here you can read free online of The Bacteriophage Its Rle in Immunity book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Bacteriophage Its Rle in Immunity a good or bad book?
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The reinoculations on to agar remain sterile or give only rare colonies of the bacterium, extreme virulence. The bouillon suspension shows complete, and, in general, permanent lysis. Inoculations on to agar always remain sterile. Obviously, it would be possible to establish a more detailed scale of virulence. (Moreover, this has been done in the curves which will be given, where the interval between no virulence and extreme virulence has been subdivided into ten steps, in accord- ance with the ...aspect of the cultures, the number of colonies of the bacteriophage, and the size of the plaques, which bear a rela- tion to its virulence. ) Practically, the appreciation is adequate with four steps, particularly in view of the fact of the extreme variability of virulence in the bacteriophage in the body of a single individual from one time to another. 176 THE BACTERIOPHAGE The expression "Shiga + + ++, Hiss +, Flexner 0, Typhoid ++, Para A 0, Para B 0, B. Coli + ++" means, then, that the bacteriophage contained in the filtrate derived from the stool of an individual presents an extreme virulence for B.
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