Handbook of bacteriology for nurses / [Harry Wardwell Carey].

  • Carey, Harry Wardwell, 1875-1935.
Date:
1930
Catalogue details

Licence: In copyright

Credit: Handbook of bacteriology for nurses / [Harry Wardwell Carey]. Source: Wellcome Collection.

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    any harmful influence. The spores may be formed in- side the body of the organism and extruded from it, or the whole organism may be changed into a spore. As a rule, one forms in each organism, either in the center or at the end. Occasionally more than one spore may form in a single bacterium. Spore formation, however, must not be interpreted as a form of reproduction. The position of the spore in the bacterium is characteristic of some species. The tetanus spore is always at the Fig. 8.—Bacillus subtilis showing spores. X 1000. (Park and Williams, after Franks. Lea & Febiger.) end, while the spore of the anthrax bacillus is located at the center. When conditions again become favor- able for growth the spore may elongate and gradually assume its original shape, or the bacillus may form in- side the body of the spore and burst the capsule. MOTILITY. The power of locomotion is observed in some bac- teria. When watched under the microscope they may be seen moving across the field of vision. The motility depends upon small, thread-like processes projecting