What is Poliomyelitis-Like Syndrome?
Poliomyelitis-Like Syndrome (also called Acute Flaccid Myelitis or AFM) is a rare neurological condition that causes sudden weakness or paralysis in the limbs, resembling poliomyelitis (polio). It primarily affects children but can occur at any age. Unlike polio, this syndrome is often linked to viral infections other than poliovirus.

What causes Poliomyelitis-Like Syndrome?

The exact cause is not always clear, but it is often associated with viral infections such as:

• Enteroviruses (especially Enterovirus D68 and Enterovirus A71)
• Adenoviruses
• Other respiratory viruses

These viruses may trigger inflammation and damage to the spinal cord’s gray matter, affecting nerve cells that control muscles.

What are the symptoms?

Symptoms usually begin suddenly and may include:

• Sudden onset of limb weakness or paralysis, often asymmetrical
• Loss of muscle tone and reflexes (flaccid paralysis)
• Facial weakness or drooping
• Difficulty swallowing or speaking
• Respiratory problems in severe cases
• Preceding respiratory illness or fever may occur days before neurological symptoms

How is it diagnosed?

Diagnosis involves:

• Clinical examination focusing on muscle strength and reflexes
• MRI scans of the spinal cord showing inflammation or lesions
• Lumbar puncture to analyze cerebrospinal fluid for signs of infection or inflammation
• Laboratory tests to detect viruses from throat swabs, stool samples, or blood
• Ruling out other causes of paralysis like Guillain-Barré syndrome or transverse myelitis

How is it treated?

There is no specific cure, but treatment focuses on supportive care and managing symptoms:

• Hospitalization for close monitoring, especially if breathing is affected
• Physical and occupational therapy to improve muscle strength and function
• Pain management and treatment of secondary complications
• Experimental treatments such as intravenous immunoglobulin (IVIG) or steroids may be tried, but evidence of effectiveness is limited
• Respiratory support may be needed in severe cases

What is the prognosis?

Recovery varies; some patients regain full muscle function while others may have long-term weakness or paralysis. Early rehabilitation improves outcomes, but some damage may be permanent.

What complications can occur?

Possible complications include:

• Permanent limb weakness or paralysis
• Respiratory failure requiring mechanical ventilation
• Muscle atrophy and contractures
• Secondary infections from immobility or respiratory issues

Who is most at risk?

• Children, especially under the age of 10
• People with recent viral respiratory infections
• Those with weakened immune systems

Can Poliomyelitis-Like Syndrome be prevented?

Prevention involves:

• Practicing good hygiene such as regular handwashing
• Avoiding close contact with sick individuals
• Staying up to date with vaccinations (although no vaccine exists specifically for AFM-causing viruses, polio vaccines protect against poliovirus)
• Prompt medical evaluation for sudden limb weakness

Are there support resources?

Yes, support includes:

• Neurologists and rehabilitation specialists
• Physical and occupational therapy programs
• Patient support groups for those affected by AFM or similar neurological conditions
• Educational resources from health authorities like CDC and WHO