It can be taken every eight hours (three times a day) and, because this is easier, more people are likely to take it properly. Ampicillin is marketed as Penbritin and Austrapen, and amoxycillin as Mox-acin and Amoxil.
The tetracyclines are a group of bacteriostatic antibiotics produced from a number of moulds. They have a wide range of activity against many organisms which are insensitive to penicillin.
These drugs are also active against some of the larger viruses and related organisms which fall between bacteria and viruses in their characteristics.
Bacteria are organisms with a cell wall containing the active ingredients of the cell. They are capable of independent reproduction.
Viruses are smaller particles without a cell wall and consisting mainly of RNA or DNA, proteins which make up the nucleus of cells and which contain the genetic material.
Viruses can reproduce only inside cells of the host but bacteria can be grown in the test tube, if suitable nutrient is available. A virus can grow only in a suitable cell culture, where it reproduces itself inside a living cell.
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