Bacterial and viral diseases essay
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Virus is a small particle (20-300 nm) that can infect the cells of living organisms, and bacterium is a microorganism itself. Viruses do not perform reproduction function, as they can replicate only in case of host cell infection. There several types of viruses and all of them differ with the structure, they are: helical viruses, icosahedral viruses, enveloped viruses and complex viruses. The simplest form of virus’ structure is the following: nucleic acid and capsid. The distinctive feature of virus activity is that it does not multiply by means of cell division, as it is acellular. Virus can infect eukaryotes (fungi, plants, animals, etc.) and prokaryotes (archaea and bacteria).
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