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Key points. Immunodeficiency disorders disrupt your body’s ability to defend itself against bacteria, viruses, and parasites. There are two types of immunodeficiency disorders: those you...
This is a list of primary immunodeficiencies (PID), which are immune deficiencies that are not secondary to another condition. The International Union of Immunological Societies recognizes nine classes of primary immunodeficiencies, totaling approximately 430 conditions.
There are more than 200 different forms of primary immune deficiency diseases (PIDDs). NIAID conducts research across all PIDDs as well as among the individual diseases that make up this broad category.
Signs and symptoms of primary immunodeficiency can include: Frequent and recurrent pneumonia, bronchitis, sinus infections, ear infections, meningitis or skin infections. Inflammation and infection of internal organs. Blood disorders, such as low platelet count or anemia.
Immunodeficiency disorders impair the immune system’s ability to defend the body against foreign or abnormal cells that invade or attack it (such as bacteria, viruses, fungi, and cancer cells). As a result, unusual bacterial, viral, or fungal infections or lymphomas or other cancers may develop.
Primary immunodeficiency disorders prevent your immune system from functioning properly, making you more susceptible to infection and certain diseases.
Key Points. Immunodeficiency disorders are associated with or predispose patients to various complications, including infections, autoimmune disorders, and lymphomas and other cancers. Primary immunodeficiencies are genetically determined and can be hereditary; secondary immunodeficiencies are acquired and much more common.
Innate immune disorders include Myd88 and IRAK-4 deficiencies, TLR3 deficiency, NF-kappa-B essential modulator (NEMO) deficiency syndrome, natural killer (NK) cell deficiency, and disorders in interferon-γ (IFN-γ) and interleukin (IL)-12/23 signaling pathways.
Credit: NIAID. Primary immune deficiency diseases (PIDDs) are inherited genetic disorders and tend to cause chronic susceptibility to infection. There are over 150 PIDDs, and almost all are considered rare (affecting fewer than 200,000 people in the United States).
Your immune system can be weakened by disease, medications or genetics. Learn more from WebMD about these disorders.