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Antibiotics are important drugs. It would be difficult to overstate the benefit penicillin and other antibiotics have played in treating bacterial infections, preventing the spread of disease and minimizing serious complications of disease.

But there is also a problem with antibiotic medications. Drugs that used to be standard treatments for bacterial infections are now less effective or don't work at all. When an antibiotic drug no longer has an effect on a certain strain of bacteria, those bacteria are said to be antibiotic resistant.

The overuse and misuse of antibiotics are key factors contributing to antibiotic resistance. The general public, doctors and hospitals all play a role in ensuring proper use of the drugs and minimizing the development of antibiotic resistance.A bacterium is resistant to a drug when it has changed in some way that either protects it from the action of the drug or neutralizes the drug. Any bacterium that survives an antibiotic treatment can then multiply and pass on its resistant properties. Also, some bacteria can transfer their drug-resistant properties to other bacteria — as if passing along a cheat sheet to help each other survive.

The fact that bacteria develop resistance to a drug is normal and expected. However, the way that drugs are used affects how quickly and to what extent drug resistance occurs.The overuse of antibiotics — especially taking antibiotics even when they're not the appropriate treatment — promotes antibiotic resistance. Antibiotics treat bacterial infections but not viral infections. For example, an antibiotic is an appropriate treatment for strep throat, which is caused by the bacterium Streptococcus pyogenes. It's not, however, the right treatment for most sore throats, which are caused by viruses.

If you take an antibiotic when you actually have a viral infection, the antibiotic is still attacking bacteria in your body — bacteria that are either beneficial or at least not causing disease. This misdirected treatment can then promote antibiotic-resistant properties in harmless bacteria that can be shared with other bacteria.

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Antibiotics are proteins or chemical substances produced by a living organism which can stop the growth of some disease producing Bacteria or Fungi.

Antibiotics does not affect any viral disease because  Antibiotics can only stop the growth of disease produced by Bacteria or Fungi and not disease caused by viruses.
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