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bacterium

bacterium, pl. bacteria (bak-ter´e-um, -a)

A unicellular prokaryotic microorganism that usually multiplies by cell division and has a cell wall that provides a constancy of form; they may be aerobic or anaerobic, motile or nonmotile, and free-living, saprophytic, parasitic, or pathogenic. See also Cyanobacteria. [Mod. L. fr. G. bakterion, dim. of baktron, a staff]
Binn's b. a type of the typhoid-paratyphoid subgroups of the nonlactose-fermenting bacteria.
blue-green b. See Cyanobacteria.
Chauveau's b. former name for Clostridium chauvoei.
endoteric b. a b. that forms an endotoxin.
exoteric b. a b. that secretes an exotoxin.
lysogenic b. 1. a b. in the symbiotic condition in which its genome includes the genome (probacteriophage) of a temperate bacteriophage; in occasional instances the probacteriophage dissociates from the bacterial genome, develops into vegetative bacteriophage, and then matures, causing lysis of the respective host b. and release into the culture medium of infective temperate bacteriophage; 2. formerly, a pseudolysogenic bacterial strain, i.e., a "carrier" strain of bacteriophage of low infectivity.
pyogenic b. a b. that causes a pyogenic infection, such as the pyogenic cocci (staphylococci, streptococci, pneumococci, meningococci) and Haemophilus influenzae.

 

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