Lab method
Immunofluorescence assay
Fluorophore-tagged antibody detection
High-yield clue
A fluorescent-labeled antibody binding its target so it glows under UV is the core immunofluorescence concept.
Overview
An antibody-based detection concept where antibodies are labeled with a fluorescent dye so that bound antigen (or a patient's antibody) lights up under fluorescence microscopy.
Classification
- Antibody-antigen assay
- Fluorescence microscopy
- Direct (DFA) vs indirect (IFA) formats
- Qualitative/titer method
Lab & identification clues
- Direct DFA: labeled antibody detects antigen directly
- Indirect IFA: labeled secondary antibody detects patient antibody
- Fluorescence pattern read visually
- Titer expresses antibody amount vocabulary
Associations
- Respiratory virus antigen detection vocabulary
- Autoantibody and rickettsial serology study association
- Confirmatory antibody testing framing
Commonly confused with
- ELISA
- Lateral flow assay
Your notes
Original concept summary for coursework. Sources checked: OpenStax Microbiology 2e and NCBI Bookshelf Medical Microbiology; reviewed 2026-06. Describes vocabulary and interpretation concepts only; not a lab protocol and not for handling specimens or identifying patient isolates.