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Search results 21 - 30 of 291 matching essays
- 21: Basic Discription Of Microbiology
- ... the health care field, and it is inparitive that I know the subject of microbiology and how if effects the world in which we live. Part one of this essay will deal with defining bacteria, viruses, fungi, microbes, and pirons. Part two of the essay will focus on indigenous micro flora that is on and in the body, and part three will describe the structure and replication procedure of viruses. Part one As stated by Prescott, Harley and Klein (1990) microbiology is the study of organisms that are usually too small to be seen with the naked eye. According to Jenson and Wright (1989) a ... They also describe microbes as organisms that are often too small to be seen without the aid of a microscope. Microbes, also known as microorganisms, can be broken down into four classifications that are bacteria, viruses, fungi, and protozoa. Prescott, Harley & Klein (1990) describe bacteria as prokaryotic cells (cells that lack a true membrane enclosed nucleus). Bacteria are both small and simple in structure; they usually are between o.5 ...
- 22: Ebola and Marburg Viruses
- Ebola and Marburg Viruses The Ebola and Marburg viruses are extremely lethal viruses that have placed repugnant thoughts on the minds of many people that have any background knowledge on this field of viral infections. Where does it come from? Where does it hide? What could it ...
- 23: Computer Viruses: Infection Vectors, and Feasibility of Complete Protection
- Computer Viruses: Infection Vectors, and Feasibility of Complete Protection A computer virus is a program which, after being loaded into a computer's memory, copies itself with the purpose of spreading to other computers. Most people, from ... programmer down to the computer hobbyist, have had either personal experience with a virus or know someone who has. And the rate of infection is rising monthly. This has caused a wide spread interest in viruses and what can be done to protect the data now entrusted to the computer systems throughout the world. A virus can gain access to a computer system via any one of four vectors: 1. Disk ... from all contact with the outside world. This would include the user programming all of the necessary code to operate the system, as even commercial products have been known to be shipped already infected with viruses. In conclusion, because a virus can enter a computer in so many different ways, perhaps the best thing to do is more a form of damage control rather than prevention. Such as, maintain current ...
- 24: Ebola Virus 4
- ... of Ebola virus were isolated from these monkeys. Serologic studies in the Philippines and elsewhere in Southeast Asia indicated that Ebola virus is a prevalent cause of infection among macaques (Manson 1989). These threadlike polymorphic viruses are highly variable in length apparently owing to concatemerization. However, the average length of an infectious virion appears to be 920 nm. The virions are 80 nm in diameter with a helical nucleocapsid, a membrane ... polymerase and 4 other undesignated proteins. Proteins are produced from polyadenylated monocistronic mRNA species transcribed from virus RNA. The replication in and destruction of the host cell is rapid and produces a large number of viruses budding from the cell membrane. Epidemics have resulted from person to person transmission, nosocomial spread or laboratory infections. The mode of primary infection and the natural ecology of these viruses are unknown. Association with bats has been implicated directly in at least 2 episodes when individuals entered the same bat-filled cave in Eastern Kenya. Ebola infections in Sudan in 1976 and 1979 occurred ...
- 25: Hepatitis
- ... abdominal pain. By then it is usually too late when the person finds out that their liver is failing and that there disease is caused by one of the most contagious, dangerous and deadliest of viruses. These viruses that were initially concealed by flu like symptoms are now known collectively as the disease of Hepatitis. The disease of Hepatitis is actually by six different types of viral infections, namely, Hepatitis A, B, C, D, E, and G. Hepatitis descries the destructive affect of the viral invasion of the body and liver by six and separate viruses. Each type of viral infection varies from one to another in degree of severity. The names of the viruses are in alphabetical order corresponding to their discovery. There is also a non-viral Hepatitis ...
- 26: Exotic Diseases And The Treat To Humanity
- ... start an outbreak in the disease. This is caused by the larvae collected in the water of the stumps, left by the mosquitoes. (Anderson, p.56, 1987) Yellow Fever is just one of the deadly viruses that are carried by insects. One of the key reasons epidemics spread is by the increase of travel. People can limit themselves to which places they travel, but what about insects? The American Screw worm ... there was just a little neglect towards the control systems, is devastating. The result of such an action could be a world epidemic in a very short period of time, with a variety of different viruses. There were several outbreaks in mosquito borne diseases between 1985 and 1992 in specific areas in the USA, St. Louis, Florida, and Texas. At the time of this outbreak there was widespread panic, forcing cancellations ... survival as a species. (Garrett, P.605, 1995) Some of the reason that proves that exotic diseases are the greatest threat to humanity is the most obvious ones. The fact that most of these deadly viruses lead to instant death or long term suffering before death frightens many. Some of the factors that help contribute to prove this correct are the mutation of microbes, poorly sanitized countries/poverty, and the ...
- 27: The Computer Underground.
- ... displays a naive understanding of CU activity. The media generally makes little distinction between different types of CU activity. Most any computer- related crime activity can be attributed to "hackers." Everything from embezzlement to computer viruses have, at one time or another, been attributed to them. Additionally, hackers are often described as being sociopathic or malicious, creating a media image of the computer underground that may exaggerate their ability for doing ... to the system when the call is discovered by the telephone company. For the average computer user the most feared of the computer underground is that of the computer virus creator. Among the CU computer viruses are generally referred to as "viri." Computer viruses are in themselves a very specific type of program but to the novice or low sophistication computer user, which the majority are, they are any program that can take over, damage or otherwise infiltrate, ...
- 28: Computer Crime Is Increasing
- ... attacking and using computer systems as they find their old activities and environments being automated. Another area of grave concern to both the operators and users of computer systems is the increasing prevalence of computer viruses. A computer virus is generally defined as any sort of destructive computer program, though the term is usually reserved for the most dangerous ones. The ethos of a computer virus is an intent to cause damage, "akin to vandalism on a small scale, or terrorism on a grand scale." There are many ways in which viruses can be spread. A virus can be introduced to networked computers thereby infecting every computer on the network or by sharing disks between computers. As more home users now have access to modems, bulletin board systems where users may download software have increasingly become the target of viruses. Viruses cause damage by either attacking another file or by simply filling up the computer's memory or by using up the computer's processor power. There are a number of different types of ...
- 29: The Ebola Virus
- The Ebola Virus The Ebola virus is one of the most deadly viruses that man kind has ever seen. In clinical cases it has a mortality rate of 50%-90%. The Viruses has many different strains including Marburg, Ebola Zaire, Reston and Sudan, each named after the location of their first clinical case. They each cause different symptoms and different mortality rates. Non the less, the collection of Ebola viruses at the present, pose a serious health threat to people in undeveloped countries and potentially in developed ones as well. The first documented clinical case of the Ebola virus was in 1967. Marburg, a ...
- 30: The Spread of AIDS
- ... brain. In 1983 and 1984, French and U.S. researchers independently identified the virus believed to cause AIDS as an unusual type of slow-acting retrovirus now called "human immunodeficiency virus" or HIV. Like other viruses, HIV is basically a tiny package of genes. But being a retrovirus, it has the rare capacity to copy and insert its genes right into a human cell's own chromosomes (DNA). Once inside a ... illness can unknowingly infect others. On average, the dormant virus seems to be triggered into action three to six years after first invading human cells. When switched on, viral replication may speed along, producing new viruses that destroy fresh lymphocytes. As viral replication spreads, the lymphocyte destruction virtually sabotages the entire immune system. In essence, HIV viruses do not kill people, they merely render the immune system defenceless against other "opportunistic: infections, e.g. yeast invasions, toxoplasmosis, cytomegalovirus and Epstein Barr infections, massive herpes infections, special forms of pneumonia (Pneumocystis carinii - ...
Search results 21 - 30 of 291 matching essays
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