Definition of Autoimmune Disease In Human Immune System

Immune system or immune system should protect the body from harmful substances from viruses, bacteria, toxins, and others. But when the immune system to crash, it will attack and destroy body tissues healthy.
This disorder is called disorder or autoimmune disease. Autoimmune disorders is a condition that occurs when the immune system mistakenly attacks and destroys healthy tissue.
Normally, the forces of the body's immune system white blood cells help protect the body against harmful substances, called antigens. Examples of antigens include bacteria, viruses, toxins, cancer cells and the blood or tissues of people or other species. The immune system makes antibodies that destroy harmful substances.
But in patients with autoimmune disorders, the immune system can not distinguish between healthy body tissue and antigens.
The result is an immune resposn damaging normal tissue. This is a hypersensitivity reaction similar to the allergic response.
In allergies, the immune system reacts to an external substance that would normally be ignored. But in autoimmune disorders, the immune system reacts to normal body tissue. That causes the immune system can not distinguish between normal tissues and antigens is unknown.
One theory states that some micro-organisms (including bacteria) and drugs may trigger some changes, especially in people who have a gene that makes them more susceptible to autoimmune disorders.


Autoimmune disorders can cause these things:

The destruction of one or more types of tissue
Abnormal organ growth
Changes in organ function
Autoimmune disorders may affect one or more organs or tissues. Organs and tissues commonly affected by autoimmune disorders are the red blood cells, blood vessels, connective tissue, endocrine glands like the thyroid or pancreas, muscles, joints, and skin.
A person can have more than one autoimmune disorders at the same time. There are over 80 types of disease caused by autoimmune disorders.

Here are some examples of diseases because the immune system attacks the body's own:

Hashimoto's thyroiditis (thyroid gland disorder)
Pernicious anemia (a decrease in red blood cells that occurs when the body can not properly absorb vitamin B12 from the digestive tract)
Addison's disease (a disease that occurs when the adrenal glands do not produce enough hormone)
Type I diabetes
Rheumatoid arthritis (arthritis)
Systemic lupus erythematosus (SLE or chronic autoimmune disorder, which affects the skin, joints, kidneys and other organs)
Dermatomyositis (muscle disease characterized by inflammation and skin rashes)
Sjorgen syndrome (an autoimmune disorder where the glands that produce tears
Multiple sclerosis (an autoimmune disorder that affects the brain and central nervous system of the spine)
Myasthenia gravis (neuromuscular disorder involving muscles and nerves)
Reactive arthritis (inflammation of the joints, urethra and eyes)
Grave disease (an autoimmune disorder that leads to a hyperactive thyroid gland)
Symptoms of autoimmune disorders varies widely and depends on the particular disease. Common symptoms were dizziness, fatigue, pain, and low grade fever.
Treatment used depends on the specific disease and symptoms. For example, thyroid supplementation, vitamins, insulin injections, or blood transfusion. No business can be done to prevent autoimmune disorders.