Influenza A and B Antigen, Direct Immunoassay

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Turnaround Time: 1 - 2 days
CPT Code:


Test Type: NP swab or NP wash or aspirate


Confirm the diagnosis of influenza type A or type B infection. This is a differentiated test and, therefore, will distinguish influenza type A from influenza type B.

Johnston SL, Bloy H. Evaluation of rapid enzyme immunoassay for detection of influenza A virus. J Clin Microbiol. 1993; 31(1):142-143. PubMed 8417019

Waner JL, Todd, SI, Shalaby H, et al. Comparison of Directigen FLU-A with viral isolation and direct immunofluorescence for the rapid detection and identification of influenza A virus. J Clin Microbiol. 1991; 29(3):479-482. PubMed 2037665

Collection Details:

Collection Instructions:

Submit one specimen per test requested. Specify the exact specimen source/origin (eg, nasopharynx). Indicate a specific test number on the request form. Check expiration date of transport; do not use expired devices.

Viral, Chlamydia, or Mycoplasma culture transport provided by LabCorp, or other appropriate transport medium; sterile leakproof container