CD55 deficiency

CD55 Deficiency

CD55 deficiency, also known as DAF deficiency or decay-accelerating factor deficiency, is a rare genetic disorder characterized by the body's inability to produce sufficient amounts of a protein known as CD55. This protein plays a crucial role in the immune system, helping to protect cells from being destroyed by the body's own immune response.

Pronunciation

CD55 deficiency is pronounced as "see-dee-fifty-five deficiency".

Etymology

The term "CD55" is an abbreviation for "Cluster of Differentiation 55", a classification system used in immunology to identify specific types of cells and the proteins they produce. The term "deficiency" comes from the Latin word "deficientia", meaning "a lack or shortage".

Symptoms

People with CD55 deficiency may experience a variety of symptoms, including anemia, fatigue, jaundice, and an increased susceptibility to infections. In severe cases, the condition can lead to life-threatening complications such as paroxysmal nocturnal hemoglobinuria (PNH) and hemolytic uremic syndrome (HUS).

Diagnosis

Diagnosis of CD55 deficiency typically involves a combination of blood tests, genetic testing, and in some cases, a bone marrow biopsy. The diagnosis is confirmed when tests show a lack of CD55 protein on the surface of red blood cells.

Treatment

Treatment for CD55 deficiency is primarily aimed at managing symptoms and preventing complications. This may include blood transfusions, medications to boost the immune system, and in severe cases, a bone marrow transplant.

Related Terms

External links

Medical encyclopedia article on CD55 deficiency
Wikipedia's article - CD55 deficiency

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