Is direct fluorescent assay (DFA) useful in the workup of pertussis (whooping cough)?

Updated: May 02, 2019
  • Author: Joseph J Bocka, MD; Chief Editor: Russell W Steele, MD  more...
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The use of direct fluorescent assay (DFA) of nasopharyngeal secretions is not recommended by the CDC; although the results can be available within minutes, the test has low sensitivity and specificity.

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