Question

In a direct fluorescent antibody test, which of the following would we most likely be looking for using a fluorescently-labeled mAb?
bacteria in a patient sample
bacteria isolated from a patient and grown on agar plates
antiserum from a patient smeared onto a glass slide
antiserum from a patient that had bound to antigen-coated beads

Answer 1

Answer:

bacteria in a patient sample

Explanation:

Direct fluorescent antibody tests ( DFA test ) -

In the DFA test , fluorescently labeled mAb is used to bind and to illuminate the target antigen . This tests are use for the quick diagnosis of bacterial disease .

For example , fluorescence - labeled antibodies against the Streptococcus pyogenes is used for the diagnosis of the strep throat from a throat swab .