What are the causes of myelitis?

Myelitis mostly occurs after infection, such as infection with viruses, bacteria, spirochetes, rickettsia, parasites, protozoa, mycoplasma and other pathogens, and mycoplasma is mostly an autoimmune reaction caused by viral infection, which is still unclear. Common myelitis include purulent myelitis, acute myelitis, acute disseminated encephalomyelitis, subacute necrotizing myelitis, acute necrotizing hemorrhagic encephalomyelitis, pediatric acute disseminated encephalomyelitis, tuberculous myelitis, etc.

Hello, the ** of myelitis is not very clear at present, cold, overwork, and trauma are common triggers, and the onset may be related to the following factors:

1) Infection. About half of patients with myelitis have symptoms of upper respiratory tract or gastrointestinal viral infection, such as colds and diarrhea, but current studies suggest that myelitis may be an autoimmune disease induced by viral infection, rather than a direct effect of infection.

2) Vaccination. Some patients with myelitis develop after vaccination, which may be related to an abnormal immune response to vaccination. The incidence of myelitis caused by vaccination is extremely low, and the abnormal immune response caused by it is related to the individual's own factors, so the vast majority of people are safe to be vaccinated.

The incidence of myelitis is 10,000. Myelitis can occur at all ages, with peaks occurring between 10 and 19 and 30 to 39 years. Myelitis is more common in young adults, but there is no difference between men and women, and it is not passed on to offspring.

According to the cause of myelitis, myelitis is medically divided into the following 6 categories:

1) Viral myelitis: myelitis caused by herpes simplex virus, herpes zoster virus, Epstein-Barr virus, cytomegalovirus, HIV and rabies virus, among which herpes zoster virus infection is the most common.

2) Bacterial, mycoplasma or spirochetal myelitis: mycobacterium tuberculosis, Mycoplasma pneumoniae, Treponema pallidum, etc.

3) Parasitic myelitis: such as schistosomiasis, toxoplasmosis, etc.

4) Myelitis after infection or vaccination: such as myelitis caused by influenza, measles, chickenpox, rubella, mumps, etc.

5) Fungal myelitis: including myelitis caused by various fungal infections.

6) Idiopathic myelitis: refers to myelitis of unknown cause.

Myelitis mostly occurs after infection, and after the invasion of pathogens such as viruses, bacteria and parasites, local infection and nerve damage are formed, and peripheral inflammation is induced, causing corresponding clinical symptoms. In addition, autoimmune diseases, vaccinations, trauma, etc. are also important for the disease**.

First, the main **.

1. Viruses: enteroviruses (coxsackie A, B virus, poliovirus), herpes zoster virus, human immunodeficiency virus, Epstein-Barr virus, cytomegalovirus, herpes simplex virus, rabies virus, Japanese encephalitis B virus and pro-human T lymphokindan-cell tumor type I (HTLV-I).

2. Bacteria, fungi, parasites: such as mycoplasma, Lyme disease, purulent myelitis, tuberculosis, syphilis and sarcoidosis.

3. Non-infectious: post-infection or post-vaccination myelitis, multiple sclerosis, subacute necrotizing myelitis, lupus or other vasculitic myelopathy, myelopathy with cancer, etc.

2. Predisposing factors.

1. Infection and autoimmune abnormalities: About half of the patients with myelitis have symptoms of viral infection of the upper respiratory tract and gastrointestinal tract, such as colds and diarrhea, before the onset of myelitis, however, current studies have shown that myelitis may be an autoimmune disease induced by viral infection, rather than a direct effect of infection.

2. Vaccination: Some patients with myelitis develop the disease after vaccination, which may be related to the abnormal immune response caused by vaccination. The probability of myelitis caused by vaccination is extremely low, and the abnormal immune response caused by it is related to the individual's own factors, so the vast majority of people are safe to be vaccinated.

Myelitis is an immune inflammation of the spinal cord.

The spinal cord connects the brain to peripheral nerves and has a large number of dense nerve fibers for conduction.

Problems with the spinal cord usually result in paralysis of limb function below the level of injury, sensory disturbances, and dysfunction of the second stool.

The most common cause of myelitis is immunogenic. With immunomodulator hormones**, patients can get better. However, more such as purulent inflammation of the spinal cord, tuberculosis, etc., also belong to spinal cord inflammation, which needs to be caused and symptomatic.