First 294 words of the document:
Antibiotics are used to treat infections caused by bacteria. Their capability of inhibiting and neutralising
dangerous bacteria has proven effective.
Antibiotics are naturally produced by organisms as a means of defence and hence survival. Through
natural, organisms that fall prey to antibiotics begin to develop a resistance, and the effects of
the antibiotics diminish over time until the organisms are immune to its effect.
Before bacteria can multiply and cause symptoms, the body's immune system can usually destroy them. We
have special white blood cells that attack harmful bacteria. Even if symptoms do occur, our immune system
can usually cope and fight off the infection. There are occasions, however, when it is all too much and some
help is needed from antibiotics.
The first antibiotic was penicillin. Such penicillin-related antibiotics as ampicillin, amoxicillin and
benzylpenicilllin are widely used today to treat a variety of infections - these antibiotics have been around
for a long time. They have been modified due to bacteria creating a high resistance.
However, they are not effective against viruses. If you have an infection it is important to know whether it is
caused by bacteria or a virus. viruses generally cause most upper respiratory tract infections, such as the
common cold and sore throats - antibiotics do not work against these viruses.
How do antibiotics work?
Antibiotics work in one of two ways:
they kill bacteria by disrupting one of the processes that they need to survive, such as turning glucose into
they prevent bacteria from reproducing and spreading, for example by disrupting the processes bacteria use
to produce new cells, such as growing new proteins