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virus
virus
virus Submicroscopic infectious organism. Viruses vary in size from ten to 300 nanometres, and contain only genetic material in the form of
DNA or
RNA. Viruses are incapable of independent existence: they can grow and reproduce only when they enter another cell, such as a bacterium or animal cell, because they lack energy-producing and protein-synthesizing functions. When they enter a cell, viruses subvert the host's metabolism so that viral reproduction is favoured. Control of viruses is difficult because harsh measures are required to kill them. The animal body has, however, evolved some protective measures, such as production of
interferon and of antibodies directed against specific viruses. Where the specific agent can be isolated,
vaccines can be developed, but some viruses change so rapidly that vaccines become ineffective. See also
antibody;
immune system
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Viruses and their outbreaks
Newspaper article from: New Straits Times; 3/28/2002; ; 700+ words
; ...timeline of computer viruses is at Computer Knowledge's Computer Virus Tutorial Web site at...resident file infector virus - viruses which infect files...evolution of computer viruses, anti- virus programs also sprung...
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 "Post-Tribune (IN)")
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VIRUSES MEDICAL MYSTERY BAFFLES SCIENTISTS
Newspaper article from: Post-Tribune (IN); 4/26/1987; 700+ words
; ...for creation of new viruses are supplied, under...Outside a cell, a virus is helpless. Inside, it can be lethal. "Viruses are the most extreme...manufacturing more viruses. The type of disease caused by a virus depends on which living...
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Virus killers: Macworld Lab tests virus software and survives. (reviews of four antiviral products) (includes related articles on antivirus performance factors and top-rated products) (Software Review) (Evaluation)
Magazine article from: Macworld; 7/1/1994; ; 700+ words
; ...namesakes, computer viruses are relatively easy...With a leading virus-protection software...performance standard for virus detection. At the...Virex, dealing with viruses becomes a virtually...that are similar to viruses in the damage they can cause. Every virus program can scan...
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Viruses, worms, trojans, and bombs. (computer "infections")
Magazine article from: Popular Science; 9/1/1989; ; 700+ words
; ...into memory, and the virus will be noticed. Mac attack Some viruses are relatively benign. For example, a virus that infected Macintosh...a new generation of viruses that modify data without...Here's how one virus works: Once a minute...
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Viruses are still going around. (computer viruses)
Magazine article from: Tape-Disc Business; 6/1/1994; ; 700+ words
; ...about a "killer" virus in the computer industry...while, computer viruses are still around...Robinson explained. Viruses are cross-referenced by type of virus, such as polymorphic...area from which the virus comes. The area...important because viruses are often centralized...
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Viruses: scourge of computer age
News Wire article from: University Wire; 2/25/1998; ; 700+ words
; ...is the one with a virus, the normal recommendations...advances, computer viruses continue to pervade...them, a computer virus can alter or destroy...system. "These viruses usually attack a...you can spread a virus." Individuals with...experience create viruses with a malicious...
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Techniques against viruses
Newspaper article from: New Straits Times; 12/2/2002; ; 700+ words
; ...software. To most people, viruses and anti-virus techniques are fascinating...signatures to identify these viruses, anti- virus software could use just one...checking. As the complexity of viruses grew, virus writers armed with more experience...
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Viruses Are Most Troublesome Creatures on Earth.
Newspaper article from: Knight Ridder/Tribune Business News; 4/30/2003; 700+ words
; ...some basic facts about viruses: Q: What is a virus? A: It's a tiny...attacked and killed by a virus. Q: What kinds of diseases do viruses cause? A: It depends...wider than the polio virus. Consequently, viruses are harder to detect...
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Viruses as an Etiology of Obesity
Magazine article from: Mayo Clinic Proceedings; 10/1/2007; ; 700+ words
; ...examines the evidence to date for virus-induced obesity. The obesogenlc animal viruses include canine distemper virus, Rous-associated virus type...same family of Paramyxoviridae viruses.8 ROUS-ASSOCIATED VIRUS TYPE 7 Carter et al925 reported...
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 "Daily News (Los Angeles, CA)")
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VIRUS HUNTERS WEED OUT BUGS.(BUSINESS)
Newspaper article from: Daily News (Los Angeles, CA); 8/19/1996; 700+ words
; ...one-third of viruses are deliberately...destructive. But other virus writers are closer...the craft of the virus hunter. For years, computer viruses spread mainly...today, anti-virus researchers say...detecting six new viruses a day, about...
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Viruses and Responses to Viral Infection
Book article from: World of Microbiology and Immunology
...Finally, some viruses can cause cancer and tumors. One such virus, Human T-cell...This aspect of viruses — that the virus does not appear...and it helps the virus introduce itself...host cell. Many viruses are extremely specific...
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Virus
Encyclopedia entry from: UXL Encyclopedia of Science
...copies of itself, a virus must use the host...The newly made viruses then leave the host...within the organism. Viruses can infect plants...The tobacco mosaic virus, one of the most studied of all viruses, infects tobacco...
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Viruses
Book article from: Animal Sciences
...on their own, viruses must force bacteria...work for them. A virus is, simply put...detection is one of a virus's main tasks, and viruses may rely on dummy...Once docked, the virus must get its nucleic...the cell. Some viruses are taken entirely...
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Ebola Virus
Encyclopedia entry from: The Gale Encyclopedia of Science
...Virus Resources The Ebola virus is one of two members of a family of viruses that is designated as...Filoviridae. The name of the virus comes from a river located...The species of Ebola virus are among a number of viruses that cause a disease...
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Latent Viruses and Diseases
Book article from: World of Microbiology and Immunology
...material, the virus becomes effectively...host. Latent viruses usually contain...manufacture of new virus begins. Bacteriophage...However, other viruses that can establish...Examples of viruses include the Herpes Simplex Virus 1 (also dubbed...
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