When is antibody-antigen testing indicated in the workup of gonorrhea?

Updated: Sep 07, 2018
  • Author: Brian Wong, MD; Chief Editor: Pranatharthi Haran Chandrasekar, MBBS, MD  more...
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Answer

The immunochromatographic strip test (IST) combines antibodies from a patient’s specimen (secretions or urine) and N gonorrhoeae antigens on a nitrocellulose strip. One study showed that this technique yielded a sensitivity of 70% and specificity of 97%. [50]

Optical immunoassay (OIA) also uses antigen-antibody reactions (monoclonal), but on a silicon wafer; a positive reaction is evidenced by a color change. A sensitivity of 60% and specificity of 90% was reported.

Both rapid tests yield results within 30 minutes and require minimal training to use. Initial test results show some promise, but additional verification of their utility in appropriate settings is still needed. [51]


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