What does the word bacteria mean?
[ Latin] The members of the genus Bacterium; generically the Schizomycetes, comprising the genera B. ( including Leptothrix, Proteus, and Pseudomonas), Bacterium, Beggiatoa, Crenothrix, Micrococcus( including Diplococcus and Neisseria), Sarcina, Spirillum( including Vibrio), Spirochete, Staphylococcus, and Streptococcus. B. comprise Saprophytic b., which can not, and Parasitic b., which can multiply in the living body. All bacteria if under favorable conditions can cause disease( Pathogenic b.), and parasitic bacteria except the natural parasites of the mouth and intestines, are always pathogenic. Bacteria are pathogenic either because they multiply excessively( Virulent or Infectious b.), or because they produce an excessive amount of poison or toxin( Toxic b.). Bacteria and their poisons either remain confined to one spot or are disseminated through the system; in the latter case spreading by continuous extension, by metastasis( as in pyaemia), or by uniform diffusion in the blood( septicaemia). See also Infection, Toxin, and Septicaemia.
Usage examples for bacteria
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