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BookmarkBacteria (singular: bacterium) are a major group of living organisms.
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Most are microscopic and unicellular, with a relatively simple cell structure lacking a cell nucleus, and organelles such as mitochondria and chloroplasts.Bacteria are the most abundant of all organisms.
Many pathogens, disease-causing organisms, are bacteria..
For more information about the topic Bacteria, read the full article at Wikipedia.org, or see the following related articles:
Prokaryote — Prokaryotes are organisms without a cell nucleus, or indeed any other membrane-bound organelles, in most cases unicellular (in rare cases, ... > read more
Escherichia coli — Escherichia coli, usually abbreviated to E. coli, is one of the main species of bacteria that live in the lower intestines of warm-blooded animals, ... > read more
Microorganism — A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated ... > read more
Streptococcus — Streptococcus is a genus of spherical, Gram-positive bacteria of the phylum Firmicutes. In addition to strep throat, members of this genus are ... > read moreNote: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Bacteria at Wikipedia.org. See the Wikipedia copyright page for more details.
