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    virus

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    Virus Overview The virus was first thought about in 1883 when A. Mayer was seeking to find the cause of the tobacco mosaic disease. Though he was unable to see them with the microscopy of his day, he postulated that a small agent caused the disease. D. Ivanowsky, later tried tests as well and also concluded that it was a disease caused by something smaller than they could see. The virus was first found and discovered in 1935 by Wendell Stanly. He was able to crystallize the virus, now known

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    The Hanta Virus

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    The Hanta Virus The hanta virus is not a new foe to humanity. This mysterious and sometimes fatal disease has plagued humanity for over 1000 years. This virus, most likely originating in China over 1000 years ago, is transmitted by human contact with mice. Only relatively recently has the hanta virus captured the attention of the United States. Although the hanta virus has been known for such a long time, there is little known about the virus. In the United States most cases are found in the southwestern

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    Influenza Virus

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    influenza subtyupes and function critical for viral fusion. Therefore, characterizing permitted evolutionary routes of the virus over the course of F10-type immune selection may serve as templates for the design of universal influenza vaccine and treatment strategies against all types of influenza viruses including those emergent pandemic strains. Selection of VN/04 (H5N1) or A/PR/8 virus escape mutants with F10 antibody was performed in MDCK cells under conditio... ... middle of paper ... ...nd effects

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    Polio Virus

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    Polio Virus Introduction The polio virus which causes poliomyelitis in humans is an enterovirus which belongs to the picornavirus (small, RNA) family. Polio virus is rapid, acid-resistant, stable, highly tissue specific and consists of a single-stranded, positive RNA. Polio virus is able to reside in the throat or intestinal tract of humans. Poliomyelitis is a highly contagious infectious disease which has three strains, poliovirus 1 (PV1), PV2 and PV3. Polio virus, although rare in developed

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    The Ebola Virus

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    interpret their genetic instructions. Therefore, a virus must have a host cell in which to survive, replicate, and produce more viruses. Without a host cell, a virus cannot function. For this reason, viruses tread the line that separates nonliving and living organisms. Many scientists agree that viruses are living because of what happens when they infect the host cell.1 The flu or the common cold viruses are not as harmful as the Ebola and Herpes virus. Bacteria on the other hand, are a type of living

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    Mysteries of the Virus

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    produces the various, essential components of the virus. These components are: 1) DNA or RNA nucleic acids, which are the genes of the virus. Viral particles posses either DNA strands or RNA strands, but never both in contrast bacterial infections contain both. The amount of DNA/RNA in a virus changes depending on the type of virus. 2) A protein which is extremely important in a hazardous virus because is provides a strong, protective barrier as the virus passes from cell to cell.2 Viruses do not contain

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    The Influenza Virus

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    Summary Most viruses are miniscule, The influenza virus measures about 100 nanometers across, and has just 13 genes.In the past decade larger viruses have been found. French researchers recently discovered a giant virus which has a volume larger than the flu virus by a thousand-fold, and contains 2,556 genes. Interestingly the genes found only match 6% of the known genes on earth. Viruses were discovered on tobacco plants in the 1800s by scientists. Infected leaves were mashed up with water and

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    The Potato Virus

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    Introduction Potato virus X (PVX) is a plant RNA virus. Its infection cycle includes invasion of the host plant, RNA replication, translation of viral proteins, cell-to-cell movement and release of new virions. Upon infection, PVX releases its plus-strand RNA genome from the virion and produces a viral replicase using host translation machinery. The replicase synthesizes minus-strand RNA. Subsequently new plus-strand genomic RNA (gRNA) and subgenomic RNAs (sgRNAs) are produced. Movement and coat

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    giant virus

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    giant virus in the permafrost in Siberia. The virus was so large that it could be seen with a light microscope, and was said to be over 30,000 years old. This virus has been named Pithovirus sibericum virus and is 1.5 micrometers long, which is much longer than the giant viruses that were found before it. The discovery of this virus has the science community scratching their heads about what family these newly found viruses belong to. Before the discovery of the Pithovirus sibericum virus, scientists

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    Hepatitis A Virus

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    Hepatitis A virus (formerly known as Enterovirus 72) has a long history and it still has a big impact on human populations in the modern world. From time of the ancient Greek doctor Hippocrates, Hepatitis A virus (HAV) was noted for causing jaundice. By the 8th century, it was realized that icteric disease was caused by an infectious agent. Later in the history, in 1885, it was discovered by scientists that hepatitis could be spread through blood transfusions. Now, it is well- known that the virus is mainly

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