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CD4 and CD8:

CD4 and CD8 cells are lymphocytes that have markers on the surfaces of the cells called CD4 and CD8. They are types of white blood cells that fight infection, and they play an important role in your immune system function. CD4 and CD8 cells are made in the spleen, lymph nodes, and thymus gland, and they circulate throughout the body in the bloodstream

CD4 cells are sometimes called T-helper cells. They help to identify, attack, and destroy specific bacteria, fungi, and virusis that affect the body. CD4 cells are a major target for HIV, which binds to the surface of CD4 cells, enters them, and either replicates immediately, killing the cells in the process, or remains in a resting state, replicating later. As the HIV virus gets into the cells and replicates, the number of CD4 cells in the blood gradually declines.

The CD4 count decreases with HIV disease progression. This process may continue for several years before the number of CD4 cells drops to a low enough level that symptoms associated with AIDS begin to appear. As treatment reduces the amount of HIV present in the body and slows progression, the CD4 count will increase or stabilize.

The test used to

measure the strength of your immune system if you have been diagnosed with HIVinfection; occasionally, it may be used with other conditions

CD4 and CD8
أنواع من خلايا الدم البيضاء التي تقاوم الالتهاب ، وأنها تلعب دورا مهما في وظيفة الجهاز المناعي الخاص بك
وتصنع فى الطحال والغدد الليمفاوية
وتسمى احيانا بالخلايا المساعدة وهى تساعد على تحديد ومهاجمة وتدمير البكتيريا الفطريات والفيروسات
وهى المحدد لفيروس الايدز

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