virus infection and types of viruses

Viruses are microorganisms , which are living while they are in the host , they make use of host nutrients and enzymes for their own reproduction and growth.
Virus means toxic particle, virus are considered non living things when they are free in the environment in the dormant stage , and become active when the encounter a suitable host.

The example of virus which make use of our body's biochemicals and nutrients for its growth is HIV virus , it make use of human DNA material for its own reproduction. pharmaguideline.

Virus infections are many times difficult to treat as virus exhibit many strains and mutations over the time which is main reason for developing antibiotic and drug resistance.

The main reason why viruses are lethal is that they incorporate its own genetic material in to host cell. this is one of major reason that viruses are associated with many cancer in humans.
Following is the brief list of disease caused by viruses
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1. Hepatitis -- Caused by hepatitis B and A virus , Acute hepatitis is mainly caused by Hepatitis A virus
2.AIDS---Caused by HIV
3.Upper respiratory tract infection caused by ---Adenovirus
4.Picorna virus --Causes common cold like condition.
5.Yellow fever caused by yellow fever virus
6.Herpese simplex is caused by Herpeseviridae
7.infulenza is caused by Orthomyxoviridae
8.Rabies ic caused by Rhabdoviridae
9. Mumps is caused by Mumps virus
10. Poliomyletes is caused by polio virus