Which color tube is used for collecting CD4 T Cell counts?

The light lavender tube is the correct choice for collecting CD4 T cell counts because it contains EDTA, an anticoagulant that effectively prevents the blood from clotting. This is crucial for flow cytometry, the method commonly used to analyze CD4 T cell counts, as it requires whole blood that remains in a liquid state to accurately evaluate the cellular components.

Additionally, the light lavender tube is specifically designed for hematological tests, including those that measure various cell populations in the blood, such as T lymphocytes. The EDTA in this tube preserves the integrity of the cells, allowing for accurate and reliable results when assessing the immune status of individuals, particularly in monitoring conditions like HIV/AIDS.