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Test Code GC-NAT GC (Gonorrhea) nucleic acid test

Important Note

Available to Providers at MCHS-Neillsville and Beaver Dam locations only.

Useful For

This test is useful for the detection of Neisseria gonorrhoeae from cervical, endocervical, vaginal swabs, and male and female urine specimens.

Synonyms/Keywords

Neisseria gonorrhoea, Gonorrhea, GC, Routine

Specimen Requirements

Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
Cervical, Endocervical, Vaginal Xpert Vaginal/Endocervical Swab Kit   1 swab    
Urine Xpert Urine Kit   20.0-50.0 mL    

Collection/Processing Instructions

This test will not be performed on children <14 years of age or for medico-legal situations.

 

1. Cervical, Endocervical, Vaginal specimens from asymptomatic or symptomatic patients submitted in an Xpert (red cap) collection tube. White swab is for cleaning; red scored shaft swab is for specimen collection. 
2. Male and female urine specimens transported in Xpert urine specimen (yellow cap) transport tube. Collect 20-50 ml of first catch urine (the first part of the stream). Patient should not have urinated for at least 1 hour prior to specimen collection. Transfer first-catch urine to the fill line on the Xpert urine specimen transport tube. Urine samples must be transferred to an Xpert urine specimen transport tube within 24 hours of collection. 

Specimen Stability Information

Specimen Type Temperature Time
Endocervical, Cervical, Vaginal Ambient 60 days
Refrigerate 60 days
Urine Refrigerate 8 days

Rejection Criteria

Specimens collected in devices other than the appropriate Xpert Collection Kits
Pre-pubescent children (<14 years of age) or medico-legal cases
Specimens transported improperly
Midstream Urine Collections
Overfilling/underfilling of the Xpert urine transport tube
Improper Source (Throat, Eye, Rectal, Urethral)
Urine collections <20 or >50 mL 

Test Information

This test cannot be utilized in medico-legal situations or prepubescent children (<14 years). In these circumstances, samples will be automatically forwarded to Mayo Laboratories using test code GCRNA.  

Interpretations

Reported as Not Detected, Detected, or Indeterminate for Neisseria gonorrhoeae. Indeterminate results are due to unidentified interference. Repeat testing with a new specimen is recommended.

Reference Range Information

Performing Location Reference Range
All sites Not Detected

Marshfield Labs Performing Department

Marshfield Labs Beaver Dam

Performing Information

Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Beaver Dam Monday through Sunday 24 hours PCR/Probe Amplification

CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
87591        

Outreach CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
87591        

Ordering Applications

Ordering Application Description
COM GC (Gonorrheae) nucl acid test