Antibiotics Essay

1643 Words 7 Pages
Antibiotics have played a major role in our society thanks to Sir
Alexander Fleming's careful observations in 1928. Without it, many lives would be in danger due to infectious diseases.

Antibiotics are chemical substances produced by various species of microorganisms and other living systems that are capable in small concentrations of inhibiting the growth of or killing bacteria and other microorganisms. These organisms can be bacteria, viruses, fungi, or animals called protozoa. A particular group of these agents is made up of drugs called antibiotics, from the Greek word anti ("against") and bios
("life"). Some antibiotics are produced from living organisms such as bacteria, fungi, and molds. Others are
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This assures that the bacteria are either killed or reduced enough in numbers so that the body can repel them. When too little antibiotic is taken, bacteria can often develop methods to protect themselves against it . The next time the antibiotic is needed against these bacteria, it will not be effective.

Taking in Antibiotics.

To work against infecting organisms, an antibiotic can be applied externally, such as to a cut on the skin's surface, or internally, reaching the bloodstream within the body. Antibiotics are made in several forms and given in different ways.

Topical. Topical application means "to a local area" such as on the skin, in the eyes, or on the mucous membrane. Antibiotics for topical use are available in the form of powders, ointments, or creams.

Oral. Tablets, liquids, and capsules are swallowed. The antibiotic is released in the small intestine to be absorbed into the bloodstream.
Troches, or lozenges, are allowed to dissolve in the mouth, where the antibiotic is absorbed through the mucous membrane.

Parenteral. Applications outside the intestine are called parenteral.
One form is an injection, which can be subcutaneous (under the skin), intramuscular (into a muscle), or intravenous (into a vein). Parenteral administration of an antibiotic is used when a physician requires a strong, quick concentration of the antibiotic in the bloodstream.

Manufacture.

Natural. At one
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