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Science assignment on rabies

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liam harvey

on 19 November 2012

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Transcript of Science assignment on rabies

by Isaac Montebello and Liam Harvey Rabies Rabies 1.Rabies is a deadly viral infection mostly spread through Animals. Rabies dates back to the year 2300 B.C. when Dog owners in the Babylonian city of Eshnunna. They are fined heavily for deaths caused by their dogs biting people. In 1806, Dogs belonging to English officers introduced the disease to Argentina. In 1883, a Physician Scientist began research to find a cure for rabies with a French Chemist Louis Pasteur and in 1886; he created a Vaccine after testing the disease from a spinal cord of a dog. The disease is Prevalent in most countries around the World, both developed and undeveloped. The majority of the Problem is in Asia, Africa and Central and South America, where 95% of the human deaths occur in Asia and Africa. The scientific name for Rabies is simply the Rabies Virus. Cause and Transmission 3. The pathogens that carry rabies are Lyssavirus and are part of the Rhabdoviridae Family. The rabies virus is a bullet shaped, single stranded enveloped RNA virus. The virus’ diameter is 75 nanometres and has a length of between 130 and 300 nanometres. Cause and transmission Rabies is transmitted from a rabid animal bite, there are also two other ways of receiving rabies but are very rare you can also contract rabies by non-bite exposure and contact between humans which is very rare. If a person has an open wound, infection and exposure to urine and faeces of a rabid animal there is still a chance of contraction. Although rare if a person diagnosed with rabies comes into contact with a healthy person the rabies could be transmitted through the air. Defence 4 The human body has a 100% fatality rate against rabies that means that if diagnosed the human body has no immune defence against the virus. Once the virus reaches a person’s central nervous system (CNS) There is a very low chance of survival and is deadly, the virus reaches this point in a few day about 1-3 days. Only one person in the history of the virus has ever survived it. Treatment 5 Rabies cannot be cured once the symptoms show, that is what make the virus fatal, a person cannot be cured if symptoms don’t show because the doctors aren’t curtain of the illness and when the virus shows in symptoms such as Headaches, fever, fear of water, difficulty swallowing, seizures and anxiety. There is no real working vaccine apart from one which is one dose of immune globulin. Pictures of Rabies 3 Lines of defence against Rabies 1st line of defence-
Mucus,skin on the outer layer of you body

2nd line of defence-
Defensive cells in the bloodflow such as:
phagocytes, eosinophils, and natural killer cells.

3rd Line of defence-
The immune system then knows what it is targeting through memory. Symptoms 2.The symptoms of Rabies can include any of the following:
•Drooling
•Convulsions
•Excitability
•Loss of feeling in areas of the body
•Loss of Muscle function
•Muscle Spasms
•Numbness and Tingling
•Restlessness
•Pain at the site of the Bite
•Swallowing
The Rabies virus travels from the wound to the Brain, causing the sufferer to have swelling and inflammation before the symptoms occur. Rarely Rabies leads to death, but most cases of death by Rabies are within Children. Rabies is currently not in Australia, but it is likely to surface through the introduction of unvaccinated and illegally migrated animals.
Vaccines There is a vaccine for the Rabies Virus it is a series of a preventive vaccine. This is generally given in 5 doses over 28 days. Most patients also receive a treatment called human rabies immunoglobulin (HRIG). Other steps to avoid Rabies are:
•To get your pets Vaccinated
•Avoid contact with Animals you don’t know
•If you do get bitten, wash the area immediately with soap and water for at least 5 minutes and then seek Medical attention.

Thank you By: Isaac Montebello and Liam Harvey
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