Test Details
Mnemonic
CHRNA
Ordering Code
3091100
CPT-4 Code(s)
87491
Specimen Information
Collect
Swab or urine
Specimen Preparation
Specimen source required for testing. Endocervical, vaginal or male urethral swab specimens in APTIMA Combo II transport medium. First catch urine in APTIMA Combo II Urine Transport Tube. Liquid level must fall between the two black indicator lines. Minimum 2.0 mL.
Dedicated specimens are required. If Chlamydia and Neisseria are both ordered one sample may be sent. Specimens used in other assay will not be tested.
Dedicated specimens are required. If Chlamydia and Neisseria are both ordered one sample may be sent. Specimens used in other assay will not be tested.
Minimum Volume
Determined by specimen type
Transport Temperature
Varies, see stability
Rejection Criteria
Specimens submitted with the white cleaning swab or with two swabs. Transport tubes without swabs. Swabs in gel, wooden swabs, dry swabs other than BD Dry Swab system. Swabs in bacterial transport medium (e.g., Culturettes) will not be tested. Urine specimens where the liquid level in the urine transport tube does not fall between the two black indicator lines. Urine specimens in sterile containers that have exceeded the 24 hour stability. Specimens collected in liquid cytology containers or media will not be tested.
Stability
Swab in APTIMA Combo II transport medium, Urine in APTIMA Combo II urine transport tube
Room temperature: 30 days
Refrigerated: 30 days
Frozen (-20°C): 90 days
Room temperature: 30 days
Refrigerated: 30 days
Frozen (-20°C): 90 days
Methodology
Transcription Mediated Amplification nucleic acid (TMA). Positive specimens are retested using a different TMA assay (different target) before reporting. The analytical sensitivity of the Chlamydia trachomatis assay is 7 inclusion-forming units per swab or 5 inclusion-forming units per milliliter of urine.
Reference Range
Not detected
Performing Laboratory
Warde Medical Laboratory