Pertussis, or “whooping cough,” is caused by the bacterium Bordetella pertussis.
Botulism is caused by the bacterium Clostridium botulinum, a hardy anaerobe.
One type of bacterium is likely very different from its neighbors, and may have equally different effects on the body.
The bacterium is technically a pathogen, so the USDA looks at it.
Caused by the bacterium Borrelia burgdorferi, the illness is transmitted by the bite of an infected tick.
The bacterium becomes constricted, divides, and finally there are two cells instead of one.
Virus or bacterium, amoeba or fungus—whatever it was, it struck.
It was in May of 1884 that he was able to announce the discovery of the coma bacillus, that is, the bacterium of cholera.
At the end of three days there is not a bacterium to be found in it.
The infectious agent is a bacterium first described by the Danish investigators, Bang and Stribolt.
1847, plural of Modern Latin bacterium, from Greek bakterion "small staff," diminutive of baktron "stick, rod," from PIE *bak- "staff used for support." So called because the first ones observed were rod-shaped. Introduced as a scientific word 1838 by German naturalist Christian Gottfried Ehrenberg (1795-1876).
bacterium bac·te·ri·um (bāk-tēr'ē-əm)
n. pl. bac·te·ri·a (-tēr'ē-ə)
Any of the unicellular, prokaryotic microorganisms of the class Schizomycetes, which vary in terms of morphology, oxygen and nutritional requirements, and motility, and may be free-living, saprophytic, or pathogenic, the latter causing disease in plants or animals.
bacteria bac·te·ri·a (bāk-tǐr'ē-ə)
Plural of bacterium.
Any of a large group of one-celled organisms that lack a cell nucleus, reproduce by fission or by forming spores, and in some cases cause disease. They are the most abundant lifeforms on Earth, and are found in all living things and in all of the Earth's environments. Bacteria usually live off other organisms. Bacteria make up most of the kingdom of prokaryotes (Monera or Prokaryota), with one group (the archaea or archaebacteria) often classified as a separate kingdom. See also archaeon, prokaryote.
Our Living Language : It is important to remember that bacteria is the plural of bacterium, and that saying a bacteria is incorrect. It is correct to say The soil sample contains millions of bacteria, and Tetanus is caused by a bacterium.
Plural of bacterium.