Antigen-antibody assay. Wells being filled with fluid samples by pipette for an immunoassay test. This is a dilution series,with wells on the left less filled than those at right. An immunoassay (antigen-antibody assay) determines the presence or absence in the blood of a specific protein such as an antigen,an antibody,or a protein like a hormone. For any specific antigen (foreign body) there is an antibody produced by the immune system which will bind to it,and may show up positively in a colour reaction test. Thus,an ELISA test (enzyme-linked immunosorbent assay) is an immuno- assay used to detect antibodies from viral infection such as the HIV virus which causes AIDS | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Meadows, Matt |
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