Is myelitis caused by viruses, bacteria, or other problems? is the end result always some paralysis?

Cord inflammation: Myelitis, usually called transverse myelitis, is an inflammation of the spinal cord. The cause is not known but may be the body's response, called an autoimmune response, to a viral infection, or other conditions such as mycoplasma pneumonia. Some people have multiple sclerosis. Many people have some leftovers from the myelitis such as pain, spasms, or possibly a degree of weakness or paralysis.