Poliomyelitis is a viral disease that can affect nerves and can lead to partial or full
Polio; Infantile paralysis; Post-polio syndrome
Causes, incidence, and risk factors
Poliomyelitis is a disease caused by infection with the poliovirus. The virus spreads by:
Direct person-to-person contact
Contact with infected mucus or phlegm from the nose or mouth
Contact with infected feces
The virus enters through the mouth and nose, multiplies in the throat and intestinal tract, and then is absorbed and spread through the blood and
- Lack of immunization against polio
- Travel to an area that has experienced a polio outbreak
Outbreaks can still occur in the developed world, usually in groups of people who have not been vaccinated. Polio often occurs after someone travels to a region where the disease is common. As a result of a massive, global vaccination campaign over the past 20 years, polio exists only in a few countries in Africa and Asia.
There are three basic patterns of polio infection: subclinical infections, nonparalytic, and paralytic. Most people have subclinical infection, and may not have symptoms.
SUBCLINICAL INFECTION SYMPTOMS
- General discomfort or uneasiness (
- Red throat
- Sore throat
People with subclinical polio infection might not have symptoms, or mild symptoms may last 72 hours or less.
Clinical poliomyelitis affects the
Signs and tests
The health care provider may find:
Difficulty lifting the head or legs when lying flat on the back
Trouble bending the neck
Cultures of throat washings, stools, or spinal fluid
Spinal tap and examination of the spinal fluid (
Test for levels of
antibodiesto the polio virus
The goal of treatment is to control symptoms while the infection runs its course.
People with severe cases may need lifesaving measures, especially breathing help.
Symptoms are treated based on their severity. Treatment may include:
urinary tract infections
Moist heat (heating pads, warm towels) to reduce muscle pain and spasms
Painkillers to reduce headache, muscle pain, and spasms (narcotics are not usually given because they increase the risk of breathing trouble)
Physical therapy, braces or corrective shoes, or orthopedic surgery to help recover muscle strength and function
The outlook depends on the form of the disease (subclinical, or paralytic) and the body area affected. Most of the time, complete recovery is likely if the spinal cord and brain are not involved.
Brain or spinal cord involvement is a medical emergency that may result in paralysis or death (usually from
Disability is more common than death. Infection that is located high in the spinal cord or in the brain increases the risk of breathing problems.
Aspiration pneumonia Cor pulmonale(a form of heart failure found on the right side of the circulation system)
- Lack of movement
- Lung problems
Myocarditis Paralytic ileus(loss of intestinal function)
- Permanent muscle paralysis, disability, deformity
Pulmonary edema Shock
- Urinary tract infections
Post-polio syndrome is a complication that develops in some patients, usually 30 or more years after they are first infected. Muscles that were already weak may get weaker. Weakness may also develop in muscles that were not affected before.
Calling your health care provider
Call your health care provider if:
Someone close to you has developed poliomyelitis and you haven’t been vaccinated
You develop symptoms of poliomyelitis
polio immunization (vaccine)is not up to date
Polio immunization (vaccine) effectively prevents poliomyelitis in most people (immunization is over 90% effective).