Laboratory Test Guide

GC (N. gonorrhoeae) and CT (Chlamydia trachomatis) Amplified Nucleic Acid Detection

General Information

Lab Name

GC and Chlam Nucleic Acid Detection

Lab Code

GCCTAD

Epic Name

GC and Chlam Nucleic Acid Detection

Description

This testing is not intended for the evaluation of suspected sexual abuse or for other medico-legal indications. The performance of this test has NOT been evaluated in patients less than 14 years of age or in pregnant women.

NOTE: A specimen type MUST be provided - correct performance and interpretation of this test is limited to the specimen types and collection methods described in Collection and Handling.

Synonyms

Gonorrhea NAA, Neisseria-Amplification

Components

Code	Name
GCCTSD	GC and Chlam NA Spec Description
CTAD	Chlam trachomatis Nucleic Acid
GCAD	N.gonorrhoeae(GC) Nucleic Acid

Interpretation

Reference Range

See individual components

Guidelines

Washington DOH Notifiable Conditions

Ordering & Collection

Specimen Type

Vagina, Endocervix, Urethra, Throat, Anal, First void urine,Liquid Pap specimen

Collection

Provide specimen type with all orders:

Endocervical or urethral specimen: Collect using the APTIMA Unisex Swab kit. Collect specimen with narrow-tipped APTIMA swab (labeled APTIMA Unisex Collection Swab); place swab in APTIMA Swab transport tube. (Large swab labeled APTIMA Cleaning Swab is used only to remove excess cervical mucus before collecting specimen with small swab. Discard large swab after cleaning cervix.)

Liquid Pap Specimen: Transfer PreservCyt Solution liquid Pap specimen into the APTIMA Specimen Transfer tube (green label)

Vagina: Collect vaginal specimen using the APTIMA Vaginal Swab Specimen Collection Kit.

Throat: Collect throat/pharynx specimens using the APTIMA Vaginal Swab Specimen Collection Kit.

Anal: Collect anal/rectal specimens using the APTIMA Vaginal Swab Specimen Collection Kit. Avoid collecting stool on the swab.

Urine: Collect first stream of first morning void (Dirty Catch for maximal sensitivity) or first stream at least 1 hour after last void in urine cup. Use disposable pipet in APTIMA urine collection kit to transfer 2 mL to the APTIMA tube, or submit 10 to 30 mL unpreserved urine in urine cup.

Also acceptable: Wait at least 1 hour after last void, then collect first stream urine in urine cup.

Unacceptable specimens: Catheterized urine,Frozen urine, unpreserved urine received >24 hours after collection, gel-based culture swab.

Handling Instructions

Swab or Urine in APTIMA tube: Transport under ambient conditions within 30 days

Unpreserved urine: Transport under ambient conditions within 24 hours; specimens received after 24 hours will be rejected.

Quantity

requested: Swab in APTIMA tube, 2 mL urine in APTIMA urine tube, or 20 mL urine in cup, 1 mL of PreservCyt Solution liquid Pap specimen in APTIMA Specimen Transfer tube
minimum: Swab in APTIMA tube, 2 mL urine in APTIMA urine tube, or 20 mL urine in cup, 1 mL of PreservCyt Solution liquid Pap specimen in APTIMA Specimen Transfer tube

Processing

Alert! Unpreserved urine must be transferred to an APTIMA urine tube within 24 hours of collection.

Login:

Order CHLAD if only CT (R/O Chlamydia trachomatis) is requested.

Order GCCAD if only GC (R/O Neisseria gonorrhoeae) is requested.

Order GCCTAD when R/O both GC and CT are requested.

Performance

LIS Dept Code

Serology (SR)

Performing Location(s)

HMC	Microbiology 206-744-5858 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420