The Possible Mechanisms of Scrapie Contraction Essay -- Biology Medica

The executable Mechanisms of Scrapie ContractionScrapie was first discovered in Great Britain in the ripe 1900s. The first case of scrapie in the United States was found in international mile in 1947 when the flock owner had imported sheep of British origin some(prenominal) years prior. Since then scientists have researched to find the cause of the scrapie agent that argon classified as transmissible spongiform encephalopathy. At the present, scientists have presented three briny theories that explain why the scrapie agent holds a dangerous threat against its armament and how it elicits its symptoms. Scientists ar finding genetic alternatives to prevent and dampen the interruption of scrapie deep down sheep and goat flocks. They use methods such as tatoing and genetic selection to tell animals exposure to the pathogen.Scrapie is defined as a fatal, degenerative disease alter the central nervous system of sheep and goats. It is widely feared because of its uncertain origin and and then its seemingly incurable status. It is closely related and often associated with bovine spongiform encephalopathy (BSE also known as Mad Cow disease), as hearty Chronic Wasting Disease (found in deer and elk) all of which are classified as transmissible spongiform encephalopathy. (Q&A. July 2005 http//www.animalagriculture.org/scrapie/AboutScrapie/QandA.htm)Scrapie is usually transmitted from the mother to her tiddler sheep or goats, through the placenta or the placental fluids. Animals septic with scrapie experience the symptoms and effect of the disease after two to five years post infection. Scrapie arouse be transmitted to susceptible sheep and goats through contact with the placenta and placental fluids of infected animals. There has been no evidence of human trans... ...entists alike are severe to make up new procedures of prevention to dampen the further spread of scrapie throughout the population of sheep and goats.Such measures taken to prevent the sprea d of scrapie take on the genetic-based flock clean up plan. Here, genetic selection is used as the primary means of scrapie regulation. The United State s Department of lands Animal Plant Health Inspection Service is victimization genetic testing to determine which exposed animals must be re beard(p) or restricted in affectedflocks and which are free to move unrestricted. This genetic clean up plan calls for the removal or barrier of all exposed susceptible sheep and goats as well as a five-year cycle of strict monitoring for the breeding of all the livestock (The genetic science of Scrapie Susceptibility. July 26 2005 http//www.aphis.usda/gov/us/nahps/scrapie/scrapie_genetics.pdf).