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Vanderbilt Pathology Laboratory Services

Test Directory



NEISSERIA GONORRHOEAE AMPLIFIED DNA ASSAY (GCD)

Department: Molecular Infectious Disease
Test Synonym(s): GCD
CPT Codes: GC-87591
Methodology: PCR - Polymerase Chain Reaction
Reference Range: Not detected
Tube Type: Orange top M2000 Collection swabs, Urine: 10 mL first voided
Specimen: Urine specimens (male or female), endocervical swabs, and male urethral swabs.
Alternate Specimen: Need Medical Director approval
Pediatric Requirements: Orange top M2000 Collection swabs, Urine: 10 mL first voided specimen in a sterile container.
Volume: 10.0 mL
Minimum Volume: 4.0 mL
Temperature: Urine - refrigerated, Swabs - room temperature if same day, refrigerated if overnight or up to 6 days after collection.
Stability: Urine - refrigerated, swabs - room temperature if same day, refrigerated if overnight or up to 6 days after collection
Reasons for Rejection: Not collected on correct swabs.
Days Performed: Tuesday and Thursday
Times Performed: Once per day on Tuesday and Thursday
TAT: 24 hours
Significance: C. trachomatis and N. gonorrhoeae infections are the most common sexually transmitted bacterial diseases in the United States. Amplified methods are now available for the detection of these two pathogens. Amplified methods offer increased sensitivity (96% for CT and GC) as opposed to non-amplified assays (67% for CT, 85% for GC). Also, amplified methods allow for testing from urine specimens.
Special Instructions: Click here to print the Molecular Diagnostics requisition.

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