HIV+ blood test by HLA typing. Fluorescent light micrograph view of human white blood cells testing HIV-positive, in a \Human Leucocyte Antigen\" (HLA

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HIV+ blood test by HLA typing. Fluorescent light micrograph view of human white blood cells testing HIV-positive, in a \Human Leucocyte Antigen\" (HLA) blood-typing test. HIV (Human Immunodeficiency Virus) is the virus which causes AIDS. Here, a patient's \"leucocyte\" white blood cells are coated on small orange glass beads. An HIV-positive result is obtained when cells on the beads do not fluoresce green, but instead die. The cells die when an antibody-antigen complex is active because the patient's blood sample contains antigens from the HIV virus. The HLA test (called a complement- fixation test) can tell the severity of infection by the strength of the antibody-antigen reaction."

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Size: 3592px × 2497px
Photo credit: © SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: aids, antibodies, antigen, blood, clinical, haematology, healthcare, hematology, hiv, hla, hospital, leucocyte, leukocyte, light, medical, medicine, micrograph, test, testing, type, typing