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Search results 71 - 80 of 291 matching essays
- 71: Influence Of Influenza
- ... were at 5 (normally 0). The child was on a current medication of a decongestant and Amoxcillin. Amoxcillin has no effect on inhibitting the viral growth of Pneumonia influenza, Rhinovirus, Parainfluenza, Corona and respitory synctial viruses. This also eliminated the disease obviously effecting the respitory tract and the child's neurology (lethargy and malaise) form being bacterial or fungal, which is common amongst young children. A number of viruses cause respitory illness similar to the common cold, but are much more severe in intensity and wit frequently serious, and even fatal, complications. The best known of the group is Influenza (flu) virus. It can ... and fatigue. Pneumonia might be defined as any inflamation of the lung tissue itself, but the term is generally applied only to infections of an acute or rapidly developing nature caused by certain bacteria or viruses. The term is generally not used for the tuberculous or fungal infections. Influenza, a viral infection of the respitory tract (air passages) that cause fever, headache, and weakness. Popularly known as "the flu," it ...
- 72: Genetic Engineering, History and Future: Altering the Face of Science
- ... which is resistant to a particular antibiotic. This now indestructible bacterial pestilence wages havoc on the human body. Genetic engineering is conquering this medical dilemma by utilizing diseases that target bacterial organisms. these diseases are viruses, named bacteriophages, "which can be produced to attack specific disease-causing bacteria" (Stableford 61). Much success has already been obtained by treating animals with a "phage" designed to attack the E. coli bacteria (Stableford 60). Diseases caused by viruses are much more difficult to control than those caused by bacteria. Viruses are not whole organisms, as bacteria are, and reproduce by hijacking the mechanisms of other cells. Therefore, any treatment designed to stop the virus itself, will also stop the functioning of its host cell. ...
- 73: AIDS
- ... covered by another protein (Combating AIDS 354). The HIV virus attacks the human helper T-cell or CD4-lymphocyte (part of the human immune defense system). This cell normally attacks and destroys foreign proteins and viruses. The normal CD4 T-lymphocyte is impervious to the HIV virus but if this cell produces a CD4 receptor molecule the HIV virus then has an entry into the cell. It attaches to the CD4 ... years which is why a lot of HIV positive people do not show AIDS symptoms for years. When some activator stimulates the provirus, then viral RNA and the HIV proteins are synthesized and new HIV viruses are produced (Nowak 964). When activated, the virus causes a suppression of the immune system so that one or more "opportunistic" diseases can gain a foothold. It is one of these diseases which eventually kills ... the invading HIV virus (Gorman 62). The standard test for the HIV virus involves taking a blood sample from the suspected individual and testing it for HIV antibodies. The body almost always develops antibodies to viruses. It usually takes a few weeks to a few months for the HIV antibodies to develop after infection with the HIV virus and sometimes longer. Some reports show that it can sometimes take years ...
- 74: The Ebola Virus: One Deadly Disease
- ... antibodies from the Ebola Reston. Many other countries have been affected with this deadly disease and are spreading rapidly. Like many things, the Ebola Virus is a member of a family. It comes from RNA viruses know as filoviruses. Marburg virus and four Ebola viruses: Ebola Zaire, Sudan, Reston and Tai are the five different viruses that have been known to cause disease in humans, while Ebola Reston only causes disease within monkeys. Filoviruses, arenaviruses, flaviruses, and bunyaviruses are the viruses responsible for causing viral hemorrhagic fevers. All forms of ...
- 75: AIDS: A U.S.- Made Monster?
- ... previously discovered. However, this claim was not published in professional publications, and soon after, Alizon and Montagnier, two researchers of the Pasteur Institute in Paris published charts of HTLV-1 and HIV, showing that the viruses had basically different structures. They also declared categorically that they knew of no natural process by which one of these two forms could have evolved into the other. According to the professional "science" magazine, the ... of genes. According to the Segals, AIDS was practically the sole topic of discussion. THE AIDS VIRUS The Segals discuss the findings of Gonda et al, who compared the HIV, visna and other closely-related viruses and found that the visna virus is the most similar to HIV. The two were, in fact, 60% identical in 1986. According to findings of the Hahn group, the mutation rate of the HIV virus was about a million times higher than that of similar viruses, and that on the average a 10% alteration took place every two years. That would mean that in 1984, the difference between HIV and visna would have been only 30%, in 1982- 20%, 10% ...
- 76: AIDS
- ... turned out to be a very unusual sort of virus. Its genetic material was not DNA, but RNA. When it infected human cells, it had its RNA direct the synthesis of viral DNA. While RNA viruses are not that uncommon, very few RNA viruses reproduce by setting up the flow of information from RNA to DNA. Such reverse flow of information does not occur at all in any DNA virus or any other living things. Hence, the virus was said to belong to the rare group of viruses called "Retro Viruses". Research provided the means to test donated blood for the presence of the antibodies to the virus, reducing the chance of ones getting AIDS from a blood transfusion. This was one ...
- 77: Sunrise on the Veldt: Order
- ... the students began to notice they were not thinking, and the order began to tear the school apart. The teacher sought order because he wanted his students to behave better. Scientists use order to control viruses. Viruses are classified by several attributes; their shape, the vectors that transmit them, and their RNA or DNA content. Once a virus is classified, it can be examined, and controlled. Biologists use order to classify other ... A virus seeks order instinctively. A virus attaches itself to a host. Then it enters into the host by exchanging its DNA or RNA. The virus then replicates itself, inside the host. Lastly, the replicated viruses release themselves from the host, and begin to attack the organism. The virus automatically does this every time it infects a host, not necessarily in the same order, but by the same method. This ...
- 78: Aids 4
- ... turned out to be a very unusual sort of virus. Its genetic material was not DNA, but RNA. When it infected human cells, it had its RNA direct the synthesis of viral DNA. While RNA viruses are not that uncommon, very few RNA viruses reproduce by setting up the flow of information from RNA to DNA. Such reverse or "retro" flow of information does not occur at all in any DNA virus or any other living things. The virus was said to belong to the rare group of viruses called "Retro Viruses". Research provided the means to test donated blood for the presence of the antibodies to the virus, greatly reducing the chance of ones getting AIDS from a blood transfusion. This was ...
- 79: Mononucleosis
- ... a century. An estimated 90 percent of mononucleosis cases are caused by the Epstein-Barr virus (EBV), a member of the herpes virus group. Most of the remaining cases are caused by certain other herpes viruses, particularly cytomegalo virus. This fact sheet focuses on mononucleosis caused by EBV. EBV is a common virus that scientists estimate has infected over 90 percent of people aged 40 or older sometime during their lives. These infections can occur with no symptoms of disease. Like all herpes viruses, EBV remains in the body for life after infection, usually kept under control by a healthy immune system. Almost anyone at any age can get mononucleosis. Seventy to 80 percent of all documented cases, however ... syndrome.) Oral steroid drugs such as prednisone can help lessen some of the symptoms of mononucleosis, but because of their potential toxicity, these drugs are best reserved for treating severe complications. Antibiotics are ineffective against viruses, and they should not be prescribed for mononucleosis itself. Some patients with mononucleosis also develop streptococcal (bacterial) throat infections, which should be treated with penicillin or erythromycin. Ampicillin (a form of penicillin) should not ...
- 80: The Molecular Biology Of Cystic Fibrosis
- ... patients, and because of the presence of normal lungs after birth, it is difficult to make an early accurate prognosis (Bunch 95). The presence of mucus in the lungs provides a site where bacteria or viruses are easily caught, but which are not removed from the lung by the action of the bronchial cilliary epithelium (Figure 1). Figure 1 - In CF the mucous layer becomes so viscous that the cilia can ... the chemical interactions of DNA, ligand conjugates and the cell membrane, a process that is very efficient, non-toxic and selective, but which needs to a lot more work; and using biological intermediates such as viruses. Viral vectors have been developed, with adenovirus and liposome systems working in vitro (Tomich 8). Methods based on liposome-mediated gene transfer show some success in clinical trials. A increase in the permeability of the ... of tumour formation. Retroviruses, which only target dividing cells, have the added disadvantages that, they are likely to only affect terminally differentiated cells, and, they can disrupt important genes. Due to the limited size of viruses there is a limitation to the amount of foreign DNA that can be added (Wolf 12). However, an experiment using an adenovirus, with the full CFTR cDNA sequence, planted into the lung epithelium of ...
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