Standard Order of Blood Draw The order of tubes used in a blood draw is important when collecting a blood sample to prevent cross contamination in the various tubes used. The first draw is the blood culture, then the coagulation tube, non-additive tube, followed by additive tubes.
Acquired immunodeficiency syndrome (AIDS) is the condition that results from long-term (chronic) HIV infection and is defined by an absolute CD4 cell count of less than 200 cells/ÂµL and specific opportunistic infections or malignancies.
Definitions: 1  HIV-Human Immunodeficiency Virus, the virus that causes AIDS. 2  AIDS-Acquired Immunodeficiency Syndrome, the condition that results from HIV infection. 3  AIDS is distinguished from HIV by the presence of an opportunistic infection or a T-cell count of 200 or less. AIDS-Acquired Immunodeficiency Syndrome, the condition that results from HIV infection. 2  AIDS is distinguished from HIV by the presence of an opportunistic infection or a T-cell count of 200 or less.