Home
HelpTest Code LAB7166 Chlamydia trachomatis and Neisseria gonorrhea PCR
Aliases
CTNG PCR
CT NG PCR
CT PCR
GC PCR
Special Collection Notes
When collecting one urine specimen for multiple urine orders, make sure all orders have the same specimen source.
Collect specimen per standard operating procedure. Endocervical, vaginal, throat, and rectal swabs collected with "Xpert" CT/NG Vaginal/Endocervical Specimen Collection Kit.
Specimen Type
Endocervical, vaginal, throat, and rectal swabs:
Xpert CT/NG Vaginal/Endocervical Specimen Collection Kit
Urine:
Sterile Container (Default)
Xpert Urine
Processing Instructions
Transport swab specimen at ambient temperature.
Urine specimens in sterile container must be received within 24 hours if stored at ambient temperature or within 8 days if stored/shipped refrigerated.
Specimen Volume
Urine:
Optimal volume: 20 – 50 mL
Minimum volume: 7 mL
Temperature
Ambient (Endocervical/Vaginal/Throat/Rectal Swabs )Refrigerated (Eye Swab)
Refrigerated if greater than 24hrs (Urine)
Sample Stability
Urine (sterile container)
Ambient: 24hrs
Refrigerated : 8 Days
Urine (Xpert)
Ambient: 3 Days
Refrigerated: 45 days
Endocervical/Vaginal/Throat/Rectal Swabs
Ambient: 60 days
Additional Notes
Unacceptable Specimens:
1. Urine specimens that contain less than 7 mL
2. Swab not received in transport media
Test/Batch Schedule
Monday – Sunday
TAT
24-72 hours
Method
Cepheid GeneXpert
Test Components
CHLAMYDIA TRACHOMATIS PCR
NEISSERIA GONORRHEA PCR
Reference Range
CHLAMYDIA TRACHOMATIS PCRNot Detected
NEISSERIA GONORRHEA PCR
Not Detected
CPT
87491
87591
Performing Section
Microbiology
Purpose/Principle
The Xpert CT/NG Assay is performed on the Cepheid GeneXpert Instrument Systems. The Xpert CT/NG Assay is cleared by the FDA to test the following specimens from symptomatic and asymptomatic individuals: first-catch male urine, female urine, and vaginal or endocervical swab specimens. The assay has been validated off-label to test throat and rectal swabs as well as eye swabs.