PrEP Use Only: Chlamydia/Gonococcus, Pharyngeal Swab, NAA
Also known as: Pre-exposure prophylaxis screening for Ct/GC, Pharyngeal Source
Use
This test is used for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae in patients who are eligible for or who are receiving pre-exposure prophylaxis for HIV (PrEP).
Special Instructions
Not provided.
Limitations
The test requires proper specimen collection using the Aptima swab collection tube. Inappropriate transport conditions or other transport devices can lead to rejection. The test results are limited to the detection of Chlamydia trachomatis and Neisseria gonorrhoeae and do not provide information on other infections or disease states. False negatives may occur if the infection is below the detection limit or due to improper specimen handling.
Methodology
PCR-based (NAA)
Biomarkers
LOINC Codes
- 90357-5 - C trach+GC pnl Nph NAA+probe
- 57288-3 - C trach rRNA Nph Ql NAA+probe
- 57289-1 - N gonorrhoea rRNA Nph Ql NAA+probe
- 11502-2 - Laboratory report
Result Turnaround Time
2-3 days
Related Documents
For more information, please review the documents below
Specimen
Nasopharyngeal Swab
Volume
1 swab (pharyngeal)
Minimum Volume
1 swab (pharyngeal)
Container
Aptima® swab specimen transport tube
Collection Instructions
Use the blue-shafted swab to rub the posterior pharynx and tonsillar areas. Remove the cap from the transport tube, place the swab into the tube, break the shaft at the scoreline, and recap the tube tightly.
Storage Instructions
Maintain specimen at room temperature or refrigerate (2°C to 30°C).
Causes for Rejection
Inappropriate transport conditions; bacterial swabs; swabs from sites other than pharyngeal; unlabeled specimens or those with a discrepancy between the specimen label and the test request form; Aptima swab transport tube with no swab, two swabs or swab not supplied by Hologic; Aptima swabs greater than 60 days from collection; any transport device other than an Aptima swab transport.