AySaKa04

…….Example Viruses Causing Death to Human………

•Introduction

•Meaning of Viral Infection

•How they multiply in a Human Body

•What is Taxonomy,Host,Genome,Morphology

•Examples Of Viruses In a HUMAN body

•How to prevent Viruses

•Information came from the ff: Sites

As we all know lot of people died because of weakness and lack of exercise,But expert says that not all of them died because of the reasons that was mentioned but lot of people don’t know that the reason that someone is dying is because of “viruses” inside a human body the viruses use our body as a host.

And the method of being a virus host is called “Viral Infection”

A virus is a tiny organism that causes an infection in the body. Viruses are made up of the genetic material known as DNA or RNA, which the virus uses to replicate. In order for a virus to survive, it must invade and attach itself to a living cell. It will then multiply and produce more virus particles.

By attaching itself to a host cell, the virus may either kill or alter the cell’s functions. When the cell dies, new types of viruses are released, and they infect other cells. This is how viruses cause disease. Generally, viruses will only infect one type of cell. For example, the cold virus will only infect cells of the upper respiratory tract.

Taxonomy:

Synonym(s): RNA tumor virus group (and related agents). Comments: In view of current knowledge of retroviruses, the “previous” classification into subfamilies (oncovirinae, lentivirinae, spumavirinae) is no longer appropriate, since the genera that made up, for example, oncovirinae are no more closely related (or similar) to one another than they are to members of other previously designed subfamilies. Retroviruses are currently classified into 7 generation.

Host:

Virus infects vertebrates.

Genome:

RNA. Single stranded. Linear; genomic nucleic acid positive sense. Genome dimeric (monomers held together by hydrogen bonds). Genome monopartite. Total genome of one monomer 7000-11000 nucleotides long. 5′ terminus has a methylated nucleotide cap. Cap sequence of type 1 m7G5ppp5′GmpNp (type A). 3′ terminus of each monomer has a poly (A) tract; 3′-terminus has a tRNA-like structure. Encapsidated nucleic acid solely genomic, or both genomic and non-viral (however, host derived RNAs and small DNA fragments are believed to be incidental inclusions).

Morphology:

Virions enveloped; slightly pleomorphic; spherical; 80-100 nm in diameter. Surface projections of envelope small (surface appears rough), or distinct (8 nm long glycoprotein); spikes; dispersed evenly over all the surface. Capsids isometric (to spherical), or rod-shaped (or a truncated cone). Nucleoid of spherical nucleocapsid symmetric, or asymmetric. Virions only of one kind.

there are many types of viruses in a human body the samples are the ff.

EM Images Example virus Name Description of Image

ViRuSeS

human T-lymphotropic virus (HTLV) Viral particle seen by Scanning electron

microscopy (SEM) at a magnification of 26,400x of human

T-lymphotropic virus attacking a T-lymphocyte .

This image is from Dennis Kunkel’s excellent

Microscopy Science and Photography Through a Microscope

web site.

most common virus in a human body

human immunodeficiency virus 1 from the Garry Lab’s HIV pages

actually there are two kinds of HIV the mature and the HIV MA ‘fullerene’

a virus

a virus

human immunodeficiency virus AIDS virus attaches to a healthy CD-4 Receptor Site – from Custom Medical Stock Photo (CMSP)

which has a edition digital catalogue available on the internet.

Contact this commercial venture for more information.

A virus

human immunodeficiency viruses Pseudocolored transmission electron micrograph of human

immunodeficiency virus (HIV) on infected human lymphocyte.

Observe the daughter hiv cells leave the infected t-cell for a new host.

This image from Custom Medical Stock Photo (CMSP) which has a edition

digital catalogue available on the internet.

Contact this commercial venture for more information.

There are all kinds of ways you can prevent a human virus. Some human virus’s like A.I.D.S are fatal, but there are things you can do to prevent it! Depending on what virus it is, there are many vaccines you can get at the doctors to help prevent whatever it may be. Also, leading a very healthy lifestyle will FOR SURE do good for your body(but that does not mean you still won’t get viruses/diseases but it will help to prevent) I personally recommend getting your flu shot, if you haven’t already booster shots and hep A and Hep B shots! Do whatever you can to prevent viruses!

New vaccine developed for preventing ‘uncommon cold’ virus

February 2nd, 2009

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