What are the causes and symptoms of transverse myelitis?
Transverse myelitis has many different causes, often triggered by a variety of viral and bacterial infections (especially those associated with a rash such as measles or chickenpox). Once the infection subsides, the inflammation in the cord begins. About a third of patients experience a flu-like illness with fever about the time they develop symptoms of TM. Sometimes, there appears to be a direct invasion of, and injury to, the spinal cord by an infectious agent (such as herpes zoster or the AIDS virus). TM can also accompany a variety of diseases that break down tissue that surrounds and insulates the nerves (demyelinating diseases), such as multiple sclerosis (MS). Some toxic substances, such as carbon monoxide, lead, or arsenic, can cause a type of myelitis characterized by inflammation followed by hemorrhage or bleeding that destroys the entire circumference of the spinal cord. Other types of myelitis can be caused by poliovirus; herpes zoster; rabies, smallpox or polio vaccination
