As it multiplies, the virus destroys the nerve cells that activate muscles.

Polio is an infectious disease caused by a virus. Poliomyelitis (or polio) is an infection caused by polioviruses. Polio can also be spread by eating raw or undercooked food or drinking water or other drinks that are contaminated with the feces of an infected person. Following the introduction of polio vaccine there has been a dramatic decrease in polio infection in Australia. People who develop this form of polio have signs of abortive polio and their symptoms are more intense.

Polio Today → Polio + Prevention . Author information: (1)Department of Microbiology, Columbia University College of Physicians & Surgeons, New York, New York 10032. Ren R(1), Racaniello VR. The basic unit of communication in the nervous system is the nerve cell (neuron).

Other symptoms may include: Stiff and sore muscles at the back of the neck, trunk, arms, and legs; Urinary problems and constipation ; Changes in muscle reaction as the disease progresses ; PARALYTIC POLIO. This is caused by the virus entering the blood stream and invading the central nervous system. They have no signs of nervous system problems. Polio Definition Poliomyelitis, also called polio or infantile paralysis, is a highly infectious viral disease that may attack the central nervous system and is characterized by symptoms that range from a mild nonparalytic infection to total paralysis in a matter of hours. Each nerve cell consists of the cell body, which includes the nucleus, a major branching fiber (axon) and numerous smaller branching fibers (dendrites). Polio vaccine, preparation of poliovirus given to prevent polio, an infectious disease of the nervous system.The first polio vaccine, known as inactivated poliovirus vaccine (IPV) or Salk vaccine, was developed in the early 1950s by American physician Jonas Salk.This vaccine contains killed virus and is given by injection.

Most infections cause mild disease, however, the virus can affect the cells of the central nervous system causing paralysis. Polio + Prevention . NONPARALYTIC POLIO. It can result in very serious consequences including meningitis, paralysis or death. Polio is a disease caused by a virus that affects the nervous system and is mainly spread by person-to-person contact. Most people with polio do not feel sick. Inactivated polio vaccine, which is about five times as expensive as oral vaccine, produces protective antibodies that prevent the poliovirus from spreading from the intestinal tract to the central nervous system. Polio and prevention ... usually in the legs. Polio (Poliomyelitis) Key disease facts. The virus reproduces itself in the gut and can spread easily to the nervous system. Unlike oral polio vaccine, it does not prevent the spread of wild poliovirus and cannot contain an epidemic because virus can still multiply inside the intestines and be shed in stool. The myelin sheath is fatty material that covers, insulates and protects nerves of the brain and spinal cord. Poliovirus spreads from muscle to the central nervous system by neural pathways.