What is a bacterium?
The microscopic world is rich in various speciesorganisms, among which bacteria also take their place. So, what is a bacterium? This unicellular (sometimes 2-, 3-cell, like gonococcus) body, the dimensions of which are very small - range from 0.5 to 500 micrometers.Bacteria are prokaryotes (lower organisms), in which, unlike eukaryotes, the genetic material is not formed into the nucleus, but freely floats in the cytoplasm as a circular DNA.
What are the bacteria?
Science knows about a thousand species of bacteria, thenas, presumably, there are much more of them - about one million species. Distinguish the bacteria in the form of cells - bacilli (cells are drawn into a rod-shaped form), cocci (cells globular), vibrios (cells in the form of a comma), spirochetes (spiral form of cells).
Bacteria also differ depending on the ability to live and multiply in the presence or absence of oxygen (respectively, aerobes and anaerobes).
Bacteria can be the cause of many diseases. For the prevention of some of them, vaccination is recommended. You can find out more about this prevention in our article What is a vaccine.
The word "bacterium" is used, for example, insentences: "Intestinal bacillus is a bacterium that lives in the human intestine," "Bacteria that are present in yogurt are extremely useful for the work of the human intestine." By the way, those who for some reason (antibiotic treatment, stress) are killed by lactic acid bacteria living in the intestine, threatens to get dysbiosis. Learn more about this disease you can from our article What is dysbiosis.
About ways of restoration of an intestine you can learn or find out, if will become familiar with our clause or article How to restore an intestine.