VIRAL IDENTIFICATION - the host cell and put to use by the...

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VIRAL IDENTIFICATION      This is not an easy job.  Although some viruses have a characteristic appearance, an electron  microscope is required to see them. Most identification of viruses is done through serological  work that involves identification of a virus by its reaction with specific antibodies.  Sometimes  the effect of a virus on host cells can be observed and this can contribute to identification.  Study  of nucleic acids is also a possible means of identification.    VIRAL MULTIPLICATION Every virus carries genes that code for viral proteins, which include the capsid proteins and other  structural components as well as enzymes needed for the replicating or processing of viral  nucleic acid. Enzymes needed for protein synthesis, ribosomes, tRNA, and energy are taken from 
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Unformatted text preview: the host cell and put to use by the virus. Some virions carry a few preformed enzymes into the cell as they enter. Other viruses do not contain any preformed enzymes, only the genes for making them. GENERAL GOALS OF ANIMAL VIRUSES 1. Early a. Destroy host cell DNA and take over control of the cell b. Transcription and/or translation of viral enzymes needed for multiplication of the viral nucleic acid c. Make many copies of the viral GENOME (RNA or DNA) 2. Late a. Make mRNA for viral PROTEINS and synthesize these proteins (for capsid, etc.) b. Assemble new virions--anywhere from several thousand to a million...
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