direct fluorescent antibody


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Related to direct fluorescent antibody: FA test

direct fluorescent antibody

Abbreviation: DFA
A fluorescent antibody test performed on sputum to detect microorganisms that invade the respiratory tract, e.g., Legionella, Mycoplasma, or Bacillus anthracis.
Synonym: direct fluorescein-conjugated antibody; direct immunofluorescence test
See also: antibody
References in periodicals archive ?
The next day, October 29, CDC detected rabies virus antigen in the skin biopsy by direct fluorescent antibody testing.
CDC recommends reconfirmation of positive test results (by using direct fluorescent antibody testing or modified acid-fast stained smears) obtained with ImmunoCard STAT![R] rapid assays from all recalled lots.
87267: Infectious agent antigen detection by immunofluorescent technique; enterovirus, direct fluorescent antibody (DFA)
All cases were confirmed by culture and direct fluorescent antibody staining or indirect immunofluorescent antibody tests.
Influenza can be confirmed by various methods, including commercially available rapid tests, viral culture, direct fluorescent antibody, reverse transcriptase polymerase chain reaction, IHC of tissues collected during autopsy (3), and paired serology.
Identification was confirmed by phage lysis and direct fluorescent antibody staining.
The nuchal skin biopsy was negative for rabies virus antigen by the direct fluorescent antibody test.
Direct Fluorescent Antibody (DFA) and Mouse Inoculation (MI) Testing of Brains
LD also can be diagnosed by a four-fold rise in anti-legionella antibody titer or by direct fluorescent antibody on sputum samples, although the latter method lacks specificity and sensitivity.
Brains of animals that died during MIT were subjected to the direct fluorescent antibody test (DFAT) with polyclonal antirabies fluorescein (FITC)-labeled immune globulins (Scientific-Research Veterinary Institute, Kazan, Russia) or FITC-labeled antirabies diagnostic conjugate (Centocor Inc., Malvern, PA).
A nuchal skin biopsy tested positive by direct fluorescent antibody test.

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