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    how does an antibiotic work on human body?

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Here are some friends with simlar question as we.And I have this question for many days,anyone help us?
Kitty said: Yes.how does an antibiotic work on human body?-I try seach this on internet but no results found.Maybe this is a stupid question.
Mike said: oh,no,you are wrong.I have found as below for this question(how does an antibiotic work on human body?),it will help you,my kids.



Answers:
I'll try to use a simple talk.
Antibiotics work to kill bacteria. Bacteria are single-cell organisms. If bacteria make it past our immune systems and start reproducing inside our bodies, they cause disease. We want to kill the bacteria to eliminate the disease.
An antibiotic is a selective poison. It has been chosen so that it will kill the desired bacteria, but not the cells in your body. Each different type of antibiotic affects different bacteria in different ways. For example, an antibiotic might inhibit a bacterium's ability to turn glucose into energy, or its ability to construct its cell wall. When this happens, the bacterium dies instead of reproducing. At the same time, the antibiotic acts only on the bacterium's cell-wall-building mechanism, not on a normal cell's. Ok?

Other Answers:
Even simpler.An antibiotic attacks something on the bacteria that our cells do not have. So it harms only them and not us. However, any drug can have toxic side effects.
Answers:
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