is spreading in poultry in Egypt and Asia. The virus is deadly to birds‚ as well as any mammal or human who come in contact with the birds. The first case of H5N1 in humans was reported to be in Hong Kong in 1997‚ and the virus has reemerged in 2003/2004 in Asia‚ Europe and Africa. Nearly 60 percent of the people with the virus has died since. Compared to other types of influenza‚ the bird flu does not spread as easily from human to human. The virus spreads between humans if an infected person is
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(homeostasis). copyright cmassengale 2 What are Viruses? A virus is a noncellular particle made up of genetic material and protein that can invade living cells. copyright cmassengale 3 Viral History copyright cmassengale 4 Discovery of Viruses Beijerinck (1897) coined the Latin name “virus” meaning poison He studied filtered plant juices & found they caused healthy plants to become sick copyright cmassengale 5 Tobacco Mosaic Virus Wendell Stanley (1935) crystallized sap from sick tobacco
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1. understand the causes of infection 1.1 bacteria - neither plant/animal. are a group of there own. very small‚ normally millions of them. multiply ++. single cell with NO nucleus Virus - small infectious agent‚ can only replicate inside living cells of organism‚ have genes of DNA or RNA Fungi - multicellular micro organisms including yeasts & moulds. used for making ABx. essential in decomposition Parasite- is an organism that lives on or in another organism to the detremenet of the host
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that affect mostly other birds‚ but few can be transmitted to humans. The most prevalent avian influenza virus in humans is the highly pathogenic Avian Influenza A (H5N1) virus‚ which has caused over 380 confirmed cases in 15 countries (Rabinowitz‚ 2010). Majority of cases have been transmitted via bird-to-human‚ with rare cases of human-to-human transmission. Continued exposure to the virus not only poses the threat of ongoing morbidity and mortality‚ but also the threat of H5N1 being able to adapt
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infected by AIDS in the past 30 year extensive research has been done in the medical field in order to combat this virus. AZT chemical name 3’-azido-3’-deoxythymidine‚ is an anti AIDS drug which is works by inhibiting the reverse transcription process (Adlam‚ 2013). The further understanding of how AZT works is crucial in order to find out exactly what it does to our bodies and the virus HIV’s ability to develop resistance to this anti HIV drug. 3’-azido-3’-deoxythymidine has been used as an anti
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Virus Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following statements is INCORRECT? a. Viruses are not able to move by themselves. b. Viruses are not able to reproduce by themselves. c. Viruses are not structurally organized. d. Viruses are nonliving particles. e. Viruses contain instructions to manufacture themselves. ____ 2. Which of the following is FALSE? a. The outer coats of all viruses are alike. b. The
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pretty quickly. Later in history‚ Shakespeare is believed to have had knowledge of the virus.
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disease caused by a virus and occurs only in human beings. Mumps is found all over the world. Mumps is a contagious disease when the salivary glands‚ on one or both sides of the jaw‚ swells. Mumps usually occurs in school age children‚ but young adults may catch the disease. Everyone born before1957 has already had mumps. After one attack of mumps‚ you will have lifelong immunity. The mumps virus is spread by contact of another person’s discharge from the nose or mouth. The virus is present in these
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organisms is the virus called rabies. Since Rabies is spread through a virus‚ we will discuss how viruses work. With the many different types of viruses‚ there are different ways that viruses affect the body. Essentially most cells have both DNA and RNA. These are the building blocks of life. When cells split in half‚ the genetic material that is there is copied and then transferred to each call. As Mike Redde explains‚ “Viruses on the other hand‚ are one-celled that only have
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which change cellular mechanisms inside the host cell‚ in a way that makes it possible for the virus to be reproduced by the host and to induce cell lysis at the end of the viral replication cycle. These alterations of the host cell share some characteristics with cancer cells‚ namely extended stimulation of the cell cycle and inhibition of apoptosis. Since this cancer like conditions are required‚ a virus without the ability to create this conditions on it self‚ would only replicate in cancer cells
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