Test Overview

Test Methodology

Transcription mediated amplification (TMA).

Test Usage

Detection of Chlamydia trachomatis and Neisseria gonorrhoeae in male or female rectal specimens.

Reference Range*


* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Adequate specimen collection is important. Mucoid specimens may cause inhibition of the assay. Some feminine sprays, powders, spermicidal agents, and lubricants may interfere with the assay and should not be used prior to specimen collection. A negative result does not exclude the possibility of infection. Predictive value of test will vary depending on disease prevalence. Nucleic acids may persist for up to 4 weeks following appropriate antimicrobial therapy.

Test Details

Days Test Performed

Tuesday-Friday and Sunday

Analytic Time

Tuesday-Friday and Sunday TAT 1 day
Specimens received on Friday or Sunday afternoon TAT 2 days

Soft Order Code


MiChart Code

Chlamydia Trachomatis/Neisseria Gonorrhoeae rectal



CT RNA Amplification
Chlamydia trachomatis RNA Amplification
Neisseria gonorrhoeae RNA Amplification
GC RNA Amplification

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Specimen Requirements

Rejection Criteria

The following specimens are unacceptable: white shaft cleaning swabs, wooden swabs, or Calgiswabs, BD Eswabs, BD ProbeTec transport, M4-RT transport.


This assay should not be used for the evaluation of suspected sexual abuse or other medico-legal investigations where chain of custody is required. MLabs does not offer chain of custody testing.


Vaginal Aptima Swab Kit

Normal Volume

1 swab

Minimum Volume

1 swab

Billing Information

Fee Codes

CPT Code

87491, 87591

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