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Antibodies
Antibodies


Definition:

Agammaglobulinemia is an inherited disorder in which there are very low levels of protective immune proteins called immunoglobulins. People with this disorder develop repeated infections.



Alternative Names:

Bruton's agammaglobulinemia; X-linked agammaglobulinemia



Causes, incidence, and risk factors:

Agammaglobulinemia is a rare disorder that mainly affects males. It is the result of a genetic abnormality that blocks the development of normal, mature immune cells called B lymphocytes.

As a result, the body produces very little (if any) immunoglobulins in the bloodstream. Immunoglobulins play a major role in the immune response , which protects against illness and infection.

Without protective immunoglobulins, people with agammaglobulinemia develop repeated infections. People with this disorder are particularly susceptible to bacterial infections caused by Haemophilus influenzae, pneumococcus (Streptococcus pneumoniae), and staphylococci, as well as to repeated viral infections. Common sites of infection include:



Symptoms:

The person may have a family history of agammaglobulinemia (or other immune disorder).

Symptoms include frequent episodes of:

Infections typically appear in the first four years of life.



Signs and tests:

The disorder is confirmed by laboratory measurement of blood immunoglobulins. Tests include:



Treatment:

The goal of treatment is to reduce the number and severity of infections as well as to provide genetic counseling to affected families.

Intravenous infusions of immunoglobulins (IVIG) help boost the immune system by providing the body with the antibodies that are decreased or missing. Routine treatment with IVIG is central to the treatment of this disorder.

Antibiotics are frequently necessary for the treatment of bacterial infections.



Support Groups:



Expectations (prognosis):

Treatment with immune globulins has improved the health of people with agammaglobulinemia. Without treatment, most severe infections are fatal.



Complications:

Calling your health care provider:

Call for an appointment with your health care provider if you or your child has experienced frequent infections.

Call for an appointment with your health care provider if you have a family history of agammaglobulinemia or other immunodeficiency disorder and you are planning to have children -- ask the provider about genetic counseling.



Prevention:

Genetic counseling may be offered to prospective parents with a family history of agammaglobulinemia or other immunodeficiency disorders .



References:

Azar AE. Evaluation of the adult with suspected immunodeficiency. Am J Med. 2007;120(9):764-768.

Bonilla FA. Update on primary immunodeficiency diseases. J Allergy Clin Immunol. 2006;117(2):S435-S441.

Morimoto Y. Immunodeficiency overview. Prim Care. 2008;35(1):159-173.




Review Date: 5/6/2008
Reviewed By: Stuart I. Henochowicz, MD, FACP, Associate CLinical Professor of Medicine, Division of Allergy, Immunology, and Rheumatology, Georgetown University Medical School. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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