Symptoms:

• Breathing stops or slows
• Constipation
• Eyelids sag or partially close
• Infant appears "floppy"
• Infant doesn't gag
• Loss of head control
• Paralysis that spreads downward
• Poor feeding and weak suckling
• Respiratory failure
• Tired all the time (lethargy)
• Weak cry

Signs and tests:

The doctor will perform a physical exam. The doctor may note decreased muscle tone, a missing or decreased gag reflex, missing or decreased deep tendon reflexes, and eyelid drooping.

A stool sample from the baby may be examined to check for the botulinum toxin or bacteria.

Electromyography (EMG) can be done to help tell the difference between muscle and neurological problems.