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Immunofluorescent assay (IFA)

A blood test sometimes used to confirm ELISA results instead of using the Western blotting. In an IFA test, HIV antigen is mixed with a fluorescent compound and then with a sample of the patient's blood. If HIV antibody is present, the mixture will fluoresce when examined under ultraviolet light.
Mentioned in: AIDS Tests
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.