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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Stammers, Sinclair |
Bildgröße: | 3592 px × 2497 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |