CD4TZellzahl

CD4TZellzahl, also known as CD4+ T cell count, refers to the measurement of the number of CD4+ T cells in the blood. CD4+ T cells are a type of white blood cell that plays a crucial role in the immune system, particularly in defending against infections caused by viruses, bacteria, and fungi. These cells are named for the CD4 surface protein they express, which is essential for their function.

A normal CD4+ T cell count typically ranges from 500 to 1,500 cells per microliter of blood. However, this range can vary depending on factors such as age, sex, and overall health. A low CD4+ T cell count, often referred to as CD4+ lymphopenia, can indicate an impaired immune system and is a key marker in the diagnosis of HIV/AIDS. Conversely, an elevated CD4+ T cell count, known as CD4+ lymphocytosis, can be associated with certain infections, autoimmune disorders, or other medical conditions.

CD4+ T cell counts are commonly measured using flow cytometry, a technique that analyzes the physical and biochemical characteristics of cells. This measurement is important for monitoring the progression of HIV/AIDS, assessing the effectiveness of antiretroviral therapy, and evaluating the immune status in various medical conditions. Regular monitoring of CD4+ T cell counts is essential for managing and treating conditions that affect the immune system.