Test Details

Mnemonic

CHRNA

Ordering Code

3091100

CPT-4 Code(s)

87491

Specimen Information

Collect

Swab or urine
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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.

Aptima Combo II Urine transport media is currently unavailable.
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Minimum Volume

Determined by specimen type
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Transport Temperature

Varies, see stability
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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.
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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
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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.
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Reference Range

Not detected
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Performing Laboratory

Warde Medical Laboratory
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