Rabies

Today I’m going to talk about: Rabies I’ve divided my presentation into two parts: First I’d like to introduce about rabies and second I’ll present same. So, let’s start with introduce Rabies, acute, contagious infection of the central nervous system,caused by a specific virus that enters the body through the bite of ananimal. All warm-blooded animals are susceptible, but in North America thedisease is most common in skunks, foxes, bats, raccoons, dogs, and cats.Most of the cases of rabies in humans are caused by the bite of one ofthese animals. The incubation period in humans varies from three weeks to120 days, with an average of about four to six weeks. Rabies is virtuallyalways fatal when vaccine is not administered. Rabies is described inmedical writings dating from 300 bc, but the method of transmission orcontagion was not recognized until 1804. In 1884 the French bacteriologistLouis Pasteur developed a preventive vaccine against rabies, andmodifications of Pasteur’s methods are still used in rabies therapy today.The Pasteur program, or variations of it, has greatly reduced thefatalities in humans from rabies. Modern treatment, following a bite by arabid or presumed rabid animal, consists of immediate and thoroughcleansing of the bite wound and injection into the wound and elsewhere ofhyperimmune antirabies serum. A 14- to 30-day course of daily injections ofrabies vaccine is then given; booster doses are given 10 days after thiscourse and again 20 days later. The traditional vaccine contains inactivated rabies virus grown induck eggs. A newer vaccine, which contains virus prepared from human cellsgrown in the laboratory, is safer and requires a shorter course ofinjections