bacterium
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GC: n

S: WebMD – http://www.webmd.boots.com/eye-health/news/20140417/bacteria-surviving-contact-lens-cleaning (last access: 5 November 2014); MEDLP – http://www.nlm.nih.gov/medlineplus/bacterialinfections.html (last access: 5 November 2014).

N:1. 1847, plural of Modern Latin bacterium, from Greek bakterion “small staff,” diminutive of baktron “stick, rod,” from PIE *bak– “staff used for support” (also source of Latin baculum “rod, walking stick”). So called because the first ones observed were rod-shaped. Introduced as a scientific word 1838 by German naturalist Christian Gottfried Ehrenberg (1795-1876).
2. Unicellular prokaryotic that commonly multiplies by cell division and whose cell is typically contained within a cell wall.
3. They may be aerobic or anaerobic, motile or non-motile, and may be free-living, saprophytic, parasitic, or even pathogenic, the last causing disease in plants or animals.
4. Examples of diseases caused by bacteria include anthrax, botulism, plague, tularemia, brucellosis, cholera, glanders and psittacosis.
5. Plural: bacteria.
6. bacterium: term in the plural standardized by ISO.
7. Cultural Interrelation: Bacterium (2006) by Brett Piper.

S: 1. OED – http://www.etymonline.com/index.php?allowed_in_frame=0&search=bacterium&searchmode=none (last access: 6 November 2014). 2 to 6. TERMIUM PLUS (last access: 6 November 2014). 7. IMDB – http://www.imdb.com/title/tt0835419/ (last access: 23 June 2016).

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CR: anthrax, antibiotic, antifungal, bacillus, bacteriophage, Bifidobacterium bifidum, biodegradation, bioterrorism, botulism, brucellosis, cholera, coccus, diphtheria, fungus, gonorrhea, Gram-negative bacterium, Gram-positive bacterium, Gram stain, Helicobacter pylori, klebsiella, microorganism, parasite, pathogen, pathogenic, penicillin, plague, pseudomonas, pyelonephritis, salmonella, salmonellosis, strain, streptomycin, stye, trachoma, triple vaccine, tuberculosis, tularemia, urobilinogen, virus, Whipple’s disease, zoonosis.