Chlamydia trachomatis, Conjunctival Swab, NAA

CPT: 87491
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Test Details


Detect Chlamydia trachomatis infection of the conjunctiva


This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA).


Nucleic acid amplification (NAA)

Specimen Requirements


Aptima® unisex swab specimen transport tube


One Aptima® unisex swab specimen transport tube with blue shaft swab


Aptima® unisex swab specimen transport tube


Remove pus or discharge from the eye. Do not use the white-shafted swab; discard this swab. Using the blue-shafted swab, labeled "unisex collection swab," thoroughly swab the lower, then the upper conjunctiva, two to three times. Remove the cap from the swab specimen transport tube, and immediately place the specimen collection swab into the transport tube. Carefully break the swab shaft at the scoreline; use care to avoid splashing the contents. Recap the swab specimen transport tube tightly.

Storage Instructions

Maintain specimen at room temperature or refrigerate (2°C to 30°C). Stable at room temperature or refrigerated for 30 days.

Causes for Rejection

Specimen with incorrect patient identification; unlabeled specimen; inappropriate specimen transport conditions; specimen leaked in transit; specimen in expired transport or incorrect transport device; specimens with any other source than conjunctiva/eye/ocular; Aptima® swab transport >30 days from collection; Aptima® swab specimens with incorrect specimen volume; Aptima® swab specimen without a swab; cleaning swab (white-shaft swab) in Aptima® swab transport; any non−Gen-Probe® swab submitted in Aptima® transport device; wooden-shafted swab in transport device; transport device with multiple swabs; bacterial swabs; ProbeTec™ Q-swabs; Aptima® vaginal swab transport


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
188080 Chlamydia, Conjunctiva, NAA 43304-5 188081 Chlamydia, Conjunctiva, NAA 43304-5
188080 Chlamydia, Conjunctiva, NAA 43304-5 188082 Disclaimer: N/A
Reflex Table for Chlamydia, Conjunctiva, NAA
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 183621 C. trachomatis NAA, Confirm 183621 C. trachomatis NAA, Confirm 43304-5

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