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Test Code SPCRGB Group B Streptococcus Rapid PCR LAB2812

Important Note

The Xpert Xpress GBS is intended for intrapartum screening only. This test is not intended to be used for routine antenatal screening.

Performing Laboratory

UnityPoint Finley Hospital

Test Method

Rapid Polymerase Chain Reaction (rPCR)

Performance

Testing is performed Sunday through Saturday.

Typically completed within 90 minutes of receipt in the lab.

Specimen Requirement

Vaginal or rectal swab using a Cepheid collection device is required.
Copan double transport swab

Specimen collection:

  1. Use gauze to wipe away excessive amounts of secretion or discharge from vaginal rectal area.
  2. Remove the Cepheid collection device (red capped double swab) from the pouch.
  3. Carefully insert the double swab into the patient's vagina. Sample secretions from the mucosa of the lower one-third part of the vagina. Rotate the swab three times to ensure uniform sample on both swabs. Do not collect a cervical sample.
  4. Using the same double swab, carefully insert the swab approximately 2.5cm beyond the anal sphincter, and gently rotate to sample anal crypts.
  5. Remove and discard the clear cap on the transport tube and place swabs into the transport tube, labeled with the barcoded patient label, pushing the cap down completely.
  6. Label the plastic transport tube appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include specimen source, date and time of collection and the initials of the person collecting the specimen.
  7. Send swab  immediately for testing.

Useful For

The Xpert® Xpress GBS test is an automated, real-time PCR test for the qualitative detection of Group B Streptococcus (GBS) DNA from vaginal/rectal swab specimens collected from pregnant patients for intrapartum testing at term (e.g., >37 weeks) who have unknown or unavailable antepartum GBS screening test results and no additional risk factors that would warrant empiric antibiotic prophylaxis.

The Xpert Xpress GBS test performed during intrapartum is intended to aid in the detection of GBS colonization in patients presenting in labor who may be candidates for antibiotic prophylaxis.

Reference Values

Presumptive Negative

CPT Code Information

87653 Detection of Infectious Agents by Probe Techniques;
Streptococcus, group B, amplified probe technique