A few nanometre sized virus generally considered non-living was responsible for some of the most catastrophic disasters in human history. Viruses are obligate parasites requiring a host cell to replicate and infect. Diseases such as common cold to AIDS are caused by viral infections. Protections against these threats are through immunity and vaccination. Viruses have characteristic capsid proteins that no other organisms have.
What is Rabies ? Rabies is an acute viral disease that can be transmitted from wild animals to unvaccinated pets and livestock, as well as to humans. It is caused by the rabies virus, which is present in the saliva of infected animals, and is transmitted through infected through the bite of a rabid animal. Once infection occurs, the virus spreads to the central nervous system and causes inflammation in the brain . Rabies is almost always fatal.
Generally they infect domestic animals, such as buffalo, cattle, sheep, camels and goats. Once the livestock are infected, other mosquitoes can spread the disease. It is also possible that the infection can be spread from other biting insects. The Rift Valley Fever outberak of 1997-1998 in eastern Africa killed both humans and livestock. It economically hurt trase in animals and the dairy indusrty.. the economy was crushed by trade imbargoes.
Mad cow disease kills many and is spreading rapidly throughout Britain and is slowly affecting the United States. Mad cow disease is a serious disease that affects many different species. There are different forms of the disease. This disease has occurred in Britain and can occur in the United States as well. Mad cow disease can be prevented.
(Foot and Mouth Disease.) FMD rarely leads to death in adult animals, but severe deaths may occur in young animals, especially lambs and piglets. (FAO, 2014.) FMD is an acute viral disease that spreads rapidly, it is extremely contagious and very labile in low p... ... middle of paper ... ...of a Foot and Mouth Disease outbreak on Brittany: A dynamic computable general equilibrium analysis, November 2011. p.1. (Gohin and Rault, 2011).
Out of all the different viral hemorrhagic fevers known to occur in humans , those caused by filoviruses have been associated with the highest case-fatality rates. These rates can be as high as 90 percent for epidemics of hemorrhagic fever caused by Ebola-Zaire virus. No vaccine exists to protect from... ... middle of paper ... ... Yet a bacterium can kill a whale ... Such is the adaptability and versatility of microorganisms as compared with humans and other so called "higher" organisms, that they will doubtless continue to colonise and alter the face of the Earth long after we and the rest of our cohabitants have left the stage forever.
Anthrax is diagnosed by isolating B. anthracis from the blood, skin lesions, or respiratory secretions or by measuring specific antibodies in the blood of suspected cases. (Dire, 2001) Demographics Anthrax is most common in the agricultural regions where it occurs in animals, such as South and Central America, Southern and Eastern Europe, Asia, Africa, the Caribbean, and the Middle East. When anthrax affects humans, it is usually because of occupational exposure to infected animals or their products. Workers who are exposed to dead animals and animal products from other countries where anthrax is more common may become infected with B. anthracis. Anthrax in animals rarely occurs in the United States.
VARIOLA VIRUS SMALLPOX INTRODUCTION The Variola virus, which is the most virulent member of Genus Orthopoxvirus, is the causative agent of smallpox. It specifically infects humans. The primary reason for infection in humans is due to its ability to evade the host immune responses, and avoid complement activation. Over the centuries, this naturally occurring virus has spread throughout the earth, through various environments, to cause severe outbreaks. The most devastation outbreak had a case-fatality rate of 40 percent in individuals who have not been vaccinated.
Keywords: Antibiotic combinations, Brucella melitensis, chronic disease. Introduction Brucellosis remains the most common and serious problem in some parts of the world.1 Many of Brucella species could infect animals through direct contact. Human could be infected when exposed to B. abortus, B. melitensis, or B. suis. In humans, the exhausting disease could become, over time, a chronic disease that affects several organs. Ingestion of unpasteurized dairy products, as well as occupational exposure to infected animals, are the major causes of brucellosis.
SARS is a virus of an animal, from wild or domestic animals that were used for food supplies. This virus is from a coronavirus family. T... ... middle of paper ... ...atients. Not only does this disease cause minor complications, but many of these small troubles mostly lead to bigger problems. Because these patients have trouble breathing, these SARS patients develop pneumonia.