Rabies :: essays research papers

RabiesRabies is an infectious disease of animals which is a penis of a group ofviruses constituting the family Rhabdoviridae. The virus particle is covered ina fatty membrane, is bullet-shaped, 70 by 180 nanometres and contains a single turbinate strand of ribonucleic acid (RNA).Although rabies is usually spread among domestic dogs and incorrect carnivorousanimals, all warm-blooded animals are susceptible to infection. The virus is lots place in the salivary glands of infected animals, referred to as rabid,and is excreted in the saliva. The bunco game of the infected animal easilyintroduces the virus into a fresh wound. In man, rabies is not usually spreadfrom man to man, rather the majority of infections occur from rabid dogs. Aftera person has been inoculated, the virus enters belittled nerve ends around the siteof the bite, and slowly travels up the nerve to legislate the central nervous system(CNS) where it reproduces itself, and go away then travel work through nerves to thesalivary glands and replicate further. The time it takes to do this depends onthe distance of the nerve it must travel - a bite on the peck will have a muchlengthier incubation period than a facial bite would. This period may last fromtwo weeks to half-dozen months, and often the original wound will have healed and been disregarded by the time symptoms begin to occur.Symptoms in humans present themselves in one of two forms stormy rabies, or dumb rabies. The former is called much(prenominal) because of the severe nature and rangeof the symptoms. The virus, upon reaching the CNS will present the person withheadache, fever, irritability, restlessness and anxiety. Progression may occuron to ponderousness pains, excessive salivation, and vomiting. After a few days or upto a week the person may go through a stage of excitement, and be afflicted withpainful muscle spasms which are sometimes set off by swallowing of saliva orwater. Because of this the afflicted will drool and learn to fear water, whichis why rabies in humans was sometimes called Hydrophobia. The patients are alsoextremely sensitive to air or drafts blown on their face. The stage lasts onlyfews days before the onrush of a coma, then death. Dumb rabies begins similarlyto furious rabies, and instead of symptoms progressing to excitement, a steadyretreat and quiet downhill stir occurs. This may be accompanied with paralysisbefore death. Rabies diagnosing in this type of cases can be missed.Unfortunately with both furious and dumb rabies, once the disease has taken hold