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Chlamydia trachomatis (CT) Amplified Assay (8000100207)
Test Mnemonic:
Specimen Requirements:

Female - endocervical or vaginal collection. Male - urethral sample. Both -  urine first catch (first void) samples, throat swab, or rectal swab.


Follow the directions in the Aptima collection kit. 

Collect first morning urine sample in sterile cup or in the transport tube in Aptima collection kit.

Liquid Pap Collection Devices may also be submitted for this test.


Urine - sterile container. Liquid Pap collection tubes (ThinPrep). Aptima collection kits.


Urine samples and Liquid Pap containers - refrigerate. Aptima collection tubes - room temperature.

Do not allow contact with other patient samples in order to avoid any cross contamination.

Specimen Preparation:

Urine samples - sterile cup with at least 20 ml of first catch (first void) urine and no preservatives.


Unpreserved Urine samples - 24 hours if refrigerated.

Liquid Pap containers - 30 days if refrigerated. 

Aptima samples - 30 days room temperature or refrigerated.

Causes for Rejection:

Failure to use Aptima collection kit; samples from non-approved sources.

Urine in tube with preservatives.

Specimen container unlabeled or labeled incorrectly. No date and time of collection or no collector information on order.

Insufficient quantity of urine for test requirements.

Reference Range:


Turnaround Time:

Test is performed daily, Monday through Friday.


Nucleic acid amplification by transcription-mediated amplification, target capture, and dual kinetic assay.


Clinical Microbiology


CT test; CT Assay; CT Probe Test; Chlamydia test

Clinical Indication:

Detection of Chlamydia trachomatis in urine first catch (first void), endocervical, urethral, throat, rectal, and vaginal specimens.

Patient Preparation :

Female - endocervical or vaginal collection.  Male - urethral sample. Both -  urine first catch (first void) specimen, throat swab, rectal swab.

CPT 4 Code:



This test is not recommended for medico-legal purposes. Collect C. trachomatis and GC cultures in cases of suspected sexual abuse.

Collection kits specific for the system must be used unless liquid Pap sample or urine are collected. No other transport system is acceptable. 

One transport may be submitted for both Chlamydia trachomatis and Neisseria gonorrhoeae testing.

Aptima transport for male and female collection available through Materials Management.

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
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