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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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    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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    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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    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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    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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    Influenza A Virus

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    2010; Cox & Subbarao, 1999). Influenza A virus is the most virulent human pathogen among the three types because they can infect both animals and human, causing of all the major flu pandemics in modern history. Influenza A virus, unlike most RNA viruses, transcribes and replicates its genome in the nucleus. This nuclear site for replication is likely due to the requirement for cellular splicing machinery and polymerase present there. The influenza A virus genome consists of

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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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    Mumps Virus

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    Mumps Virus Mumps is a paramyxovirus that is closely related to the parainfluenza virus. Its symptoms were first described in the 5th century BC, and it was a very common childhood affliction until the last several decades. It was identified as a virus in 1934, and an effective vaccine was developed in 1967. Mumps is acquired by aerosol, necessitating close human interaction for spread. Human beings are the only known reservoir for mumps virus, and there is only one serotype. Multiplication

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    VARIOLA VIRUS

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    VARIOLA VIRUS SMALLPOX INTRODUCTION The Variola virus, which is the most virulent member of Genus Orthopoxvirus, is the causative agent of smallpox. It specifically infects humans. The primary reason for infection in humans is due to its ability to evade the host immune responses, and avoid complement activation. Over the centuries, this naturally occurring virus has spread throughout the earth, through various environments, to cause severe outbreaks. The most devastation outbreak had a

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