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The virus is most often spread by person to person contact with the stool or saliva of the infected person. Two types of vaccines have been developed to prevent the occurrence and spread of the poliomyelitis virus. The first is an inactivated, or killed, form of the virus and the second is an attenuated, or weakened, form of the virus.
Poliomyelitis (/ ˌ p oʊ l i oʊ ˌ m aɪ ə ˈ l aɪ t ɪ s / POH-lee-oh-MY-ə-LY-tiss), commonly shortened to polio, is an infectious disease caused by the poliovirus. [1] Approximately 75% of cases are asymptomatic; [5] mild symptoms which can occur include sore throat and fever; in a proportion of cases more severe symptoms develop such as headache, neck stiffness, and paresthesia.
The virus targets the nervous system, which is why it sometimes triggers spinal and respiratory paralysis—and death. Polio primarily infects children under 5 and has done so around the globe for ...
Oral polio vaccine contains live attenuated (weakened) strains of the three serotypes of poliovirus. Passaging the virus strains in monkey kidney epithelial cells introduces mutations in the viral IRES, and hinders (or attenuates) the ability of the virus to infect nerve tissue. [26]
A few could contract meningitis if the polio virus attacks the covering of the spinal cord or brain. Polio is fatal for 2%-10% of those paralyzed or between 1 in 2,000 to 1 in 10,000 of those ...
A virus that affects nerves in the spinal cord or brain stem causes polio. A young girl using an abacus in a bed at the Columbia Presbyterian Medical Center in New York, circa 1950. Douglas Grundy ...
Post-polio syndrome (PPS, poliomyelitis sequelae) is a group of latent symptoms of poliomyelitis (polio), occurring at about a 25–40% rate (latest data greater than 80%). ). They are caused by the damaging effects of the viral infection on the nervous system and typically occur 15 to 30 years after an initial acute paralytic att
Polio is “shorthand for poliomyelitis, a disease of the central nervous system caused by infection with poliovirus,” Dr. Richard Lloyd, professor of molecular virology and microbiology at ...