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Search results 41 - 50 of 291 matching essays
- 41: Hantavirus
- ... the lab obtained samples from the people from Four Corners, it was suggested that the samples be tested against antibodies for every virus that was available. Finally, on June 3, antibodies against a family of viruses called hantaviruses, cross-reacted in test tubes with blood from the patients. And then patient blood injected into mice from the compound showed an even stronger reaction to the hantavirus reagents. That helped to prove ... HFRS involving hospitalization are reported each year throughout the world, with more than half in China. Death rates vary from 0.1% for HFRS caused by Puumala to 5-10% from HFRS involved with HTN viruses (CDC 2). The clinical course of HFRS follows five overlapping stages: febrile, hypotensive, oliguric, diuretic, and convalescent. The course of action usually starts with a severe headache, backache, fever, and chills. When the febrile stage ... somewhat effective treatment for HFRS. Unfortunately, it is only effective if used early in the course of the disease. The treatment known as Ribavirin is a broad-spectrum antiviral drug. It is effective against RNA viruses in vitro and in vivo. This treatment has shown a reduced mortality when administered early enough (Care 1). However, the treatment is not effective when the disease is advanced. There is one adverse side ...
- 42: AIDS History and Treatment
- ... third step is known as the integration phase, which occurs when the virus enters the nucleus with its newly copied DNA. The fourth stage, exploration, occurs when the virus reenters the cytoplasm and creates new viruses. The last step is known as the new virus stage. This involves the exit of the new cells from the cell in order to attack new viruses (Groopman, 16). There are several forms of treatment that are used to delay the process of AIDS, which in turn, prolong the lives of the diseased individuals. The most common forms of treatment are drugs ... of another form of treatment known as protease inhibitors. The second form of treatment is known as protease inhibitors. Protease inhibitors were developed in 1995 as a way to disrupt the assembly of the HIV viruses in the cell, thus hindering the new virus stage. Protease inhibitors do this by attacking a vital protein known as protease, which is crucial for the development of new viruses. There are several different ...
- 43: Internet, Its Effects In Our Lives And The Future Of The Internet
- ... what could happen. Once we understand the actual risks, we can legislate accordingly and with full regard to the competing interests at stake. But there is another problem that practically circulates through the Internet: The viruses. They can move stealthily and strike without warning. Yet they have no real life of their own, and goo virtually unnoticed until they find a suitable host. Computer viruses- tiny bits of programming code capable of destroying vast amounts of stored data- bear an uncannily close relationship to their biological namesake. And like natural viruses are constantly changing, making them more and more difficult to detect. It is estimated that two or three new varieties are written each day. Most experts believe that a virus is created by an ...
- 44: The Internet And Its Effects And Its Future
- ... what could happen. Once we understand the actual risks, we can legislate accordingly and with full regard to the competing interests at stake. But there is another problem that practically circulates through the Internet: The viruses. They can move stealthily and strike without warning. Yet they have no real life of their own, and goo virtually unnoticed until they find a suitable host. Computer viruses- tiny bits of programming code capable of destroying vast amounts of stored data- bear an uncannily close relationship to their biological namesake. And like natural viruses are constantly changing, making them more and more difficult to detect. It is estimated that two or three new varieties are written each day. Most experts believe that a virus is created by an ...
- 45: Columbian Voyages- Their Effec
- ... to many factors, the conquest of the Europeans, the cultural vacuum created by European attempts to Christianize the Amerindians, and the introduction of new and lethal micro-organisms into the ecosystem. More commonly known as viruses, these organisms wreaked havoc with a population that had never been exposed to them previously. Crosby chalks this up as another way the Europeans decimated the population of the Amerindians, but neglected to mention that although the introduction of new viruses and diseases into a culture is devastating, it is an integral part of nature and cannot be avoided. There are many reasons that disease is a necessary part of an ecosystem. First, and most obvious ... was not a prevalent factor to check the growth of population, then the Malthusian Law certainly would be. However, checking the growth of population is not the only reason the disease is needed. Exposure to viruses can also help future generations of humans live longer and more fruitful lives. Strange as it may sound, being exposed to a particular virus can help ones children become better equipped to deal ...
- 46: Computer Virus
- ... there was no virus protection in the first place, it was going to be very difficult to determine how many floppy disks and hard drives had been infected. I wished I had learned about computer viruses a long time ago. What is a computer virus, anyway? Is it a computer with a cold? A computer "virus" is called a virus because of three distinct similarities to a biological virus. They are ... a "host," or functional program to which it can attach. ? The virus must do some kind of harm to the computer system or at least cause some kind of unexpected or unwanted behaviour. Sometimes computer viruses just eat up memory or display annoying messages, but the more dangerous ones can destroy data, give false information, or completely freeze up a computer. The Stealth_c virus is a boot sector virus, meaning ... boot-up programs. The "stealth" in the name comes from the capability of this virus to possibly hide from anti-virus software. Virtually any media that can carry computer data can carry a virus. Computer viruses are usually spread by data diskettes, but can be downloaded from the Internet, private bulletin boards, or over a local area network. This makes it extremely easy for a virus to spread once it ...
- 47: The Human Immunodeficiency Virus And Mutations
- ... it before the onset of AIDS. BACKGROUND In order to be able to fully comprehend and analyze this question we must first ascertain what HIV is, how the body attempts to counter the effects of viruses in general, and how HIV infects the body. Definition HIV is the virus that causes AIDS. HIV is classified as a RNA Retrovirus. A retrovirus uses RNA templates to produce DNA. For example, within the ... copies of its genetic material. These new HIV clones become covered with protein coats and leave the cell to find other host cells where they can repeat the life cycle. The Body Fights Back As viruses begin to invade the body, a few are consumed by macrophages, which seize their antigens and display them on their own surfaces. Among millions of helper T cells circulating in the bloodstream, a select few ... the macrophage, the T cell becomes activated. Once activated, helper T cells begin to multiply. They then stimulate the multiplication of those few killer T cells and B cells that are sensitive to the invading viruses. As the number of B cells increases, helper T cells signal them to start producing antibodies. Meanwhile, some of the viruses have entered cells of the body - the only place they are able to ...
- 48: HIV
- ... of the American population I have lived in a cloud of ignorance about the HIV and AIDS crisis. I have never know anyone close to me that has been infected with either of the two viruses. So when the option to research something to do with sexuality arouse I felt this would definitely further my education about a lethal killer that is roaming this earth. Since I knew next to nothing ... years ago."(Kelly 524). It is said that the virus stayed mainly in this closed society until many years later. Many say the disease spread when international travel began to increase. The HIV and AIDS viruses were believed to arrive in the United States sometime during the nineteen seventies. It was a common disease between gay males and intravenous drug abusers. Now it is well known that the viruses have been transmitted through sexually, occasionally through blood and organ transplants. The acronym HIV stands for Human Immunodeficiency Virus, where as the acronym AIDS stands for Acquired Immunodeficiency Syndrome. When someone has contracted the ...
- 49: The Internet Its Effects And Its Future
- ... what could happen. Once we understand the actual risks, we can legislate accordingly and with full regard to the competing interests at stake. But there is another problem that practically circulates through the Internet: The viruses. They can move stealthily and strike without warning. Yet they have no real life of their own, and goo virtually unnoticed until they find a suitable host. Computer viruses- tiny bits of programming code capable of destroying vast amounts of stored data- bear an uncannily close relationship to their biological namesake. And like natural viruses are constantly changing, making them more and more difficult to detect. It is estimated that two or three new varieties are written each day. Most experts believe that a virus is created by an ...
- 50: H.i.v. About Aids
- ... expunge it before the onset of AIDS. In order to be able to fully comprehend and analyze this question we must first ascertain what HIV is, how the body attempts to counter the effects of viruses in general, and how HIV infects the body. Definition HIV is the virus that causes AIDS. HIV is classified as a RNA Retrovirus. A retrovirus uses RNA templates to produce DNA. For example, within the ... the virus produces RNA copies of its genetic material. These new HIV clones become covered with protein coats and leave the cell to find other host cells where they can repeat the life cycle. As viruses begin to invade the body, a few are consumed by macrophages, which seize their antigens and display them on their own surfaces. Among millions of helper T cells circulating in the bloodstream, a select few ... the macrophage, the T cell becomes activated. Once activated, helper T cells begin to multiply. They then stimulate the multiplication of those few killer T cells and B cells that are sensitive to the invading viruses. As the number of B cells increases, helper T cells signal them to start producing antibodies. Meanwhile, some of the viruses have entered cells of the body - the only place they are able to ...
Search results 41 - 50 of 291 matching essays
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