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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    from the bodies of the bacteria, called flagella (singular form, flagellum), which, by moving to and fro with a whip-like motion propel the bodies forward. The flag- ella may be single or multiple, and may be placed at one or both ends or all around the bacterium. Bacteria that possess the power of motion are spoken of as motile bacteria. Motility is governed by environment, for motion is lost when the conditions of life are un- A B Fig. 9.—A, bacilli showing one polar flagellum. B, bacilli showing multiple flagella. (Park and Williams. Lea hz Febiger.) favorable and is most active when they are favorable. The property of locomotion is limited to bacilli and spirilla; the cocci do not move. PROPERTIES OF BACTERIA. The property of producing pigment or coloring matter is peculiar to some kinds of bacteria. They are called chromo-bacteria. The color produced by each species is always the same and is distinctive. In gen- eral the pigment is in the form of small fatty globules