Definition

Poliomyelitis (polio) is a serious viral infection. It can damage the muscles and nerves. It can also be fatal.

At this time, it is very rare in the Western world. This is due to vaccination.

Causes    TOP

Polio is caused by a certain virus. It is spreads from contact with:

• Someone else who has it
• Infected saliva or stool
• Contaminated water or sewage

The virus enters the body through the mouth. It travels into the bowels. It grows and spreads quickly. The virus can also travel through the blood and lymph. From there, it can attack and damage parts of the nervous system. This can lead to loss of muscle control and paralysis.

Interaction of Lymph, Blood Vessels, and Intestines Copyright © Nucleus Medical Media, Inc.

Risk Factors    TOP

The risks for polio are:

• Never having the vaccine—or not finishing the series
• Traveling to places where the infection is still common, such as:
  • Parts of Africa, Asia, and the Middle East
  • Ukraine

Symptoms    TOP

Some people may not have symptoms. In others, it may cause:

• Sore throat
• Fever
• Sore muscles
• Headache
• Tiredness
• Nausea
• Back or neck pain and stiffness

If the nervous system is involved, it may cause:

• Muscle weakness
• Loose or floppy muscles
• Breathing problems
• Urinary problems
• Inability to move one or both sides of the body

Some people have postpolio syndrome years after the first infection.

Diagnosis    TOP

The doctor will ask about your symptoms, and health and travel history. A physical exam will be done. Tests may be done to look for infection. They may be:

• Swabs of the throat or rectum
• Stool testing
• Blood tests
• Lumbar puncture to test the fluid around the brain and spinal cord

Treatment    TOP

The goal of treatment is to ease symptoms and lower the risk of problems. It may involve:

• Rest
• Medicines to ease pain and fever
• Breathing support with a ventilator
• Physical therapy—to help movement and muscle strength

Prevention    TOP

The best way to prevent polio is with a vaccine. A booster vaccine may be needed for those who have a high risk. This includes people traveling to places where polio is common.