Chlamydia Trachomatis and Neisseria Gonorrhoeae (CT/NG)

CPT Code(s):

  • 87801
  • 87491
  • 87591

Additional Information:

Epic order code: LAB1376

Performed:

Tuesday and Thursday

Reported:

4 days from receipt of the specimen

Use:

This test is used to detect sexually transmitted diseases, specifically Chlamydia trachomatis and Neisseria gonorrhoeae.

Specimen Requirements:

Sample Types

  • Female vaginal swabs collected in the cobas® PCR Female Swab Kit
  • Urine collected in the cobas® PCR Urine Kit
  • Gynecologic samples collected in PreservCyt (ThinPrep)
Unacceptable Conditions:

  • Frozen specimens
  • Swabs or samples collected in any other transport media
Stability (collection to initiation of testing):

  • Thinprep (PreservCyt): Three weeks at 15 - 30 °C.
  • Swab specimens collected with the cobas® PCR Female Swab Sample Kit and urine collected with the cobas® PCR Urine Sample Kit may be stored at 2 - 30 °C for up to 12 months once the specimens have been stabilized in cobas® PCR Media.
  • Neat urine is stable at 2 - 30 °C for up to 24 hours.

Reference Values:

Negative (interpretative report provided)

Interpretation Data:

Interpretation Data Result
CT positive/
NG negative
CT DNA is detected
CT negative/
NG positive
NG DNA is detected
CT negative/
NG negative
CT/NG DNA is not detected
CT invalid/
NG invalid
A valid result is not obtained
CT positive/
NG invalid
CT DNA is detected; NG testing is invalid
CT negative/
NG invalid
CT DNA is not detected; NG testing is invalid
CT invalid/
NG positive
NG DNA is detected; CT testing is invalid
CT invalid/
NG negative
NG DNA is not detected; CT testing is invalid