Test Code MRSAPCR Staphylococcus aureus/Methicillin-Resistant Staphylococcus aureus (MRSA) by PCR, Wound
Additional Codes
St. Luke's Compendium Code (Iatric): M300.0500
Performing Laboratory
St. Lukes Hospital Laboratory
Methodology
Polymerase Chain Reaction (PCR) Using GeneXpert®
(Cepheid)
Specimen Requirements
Submit only 1 of the following specimens:
Deep Wound
1. Prepare site, wash wound margins well with antiseptic soap, and
rinse with sterile saline. Remove surface exudate, debris, and
pus.
2. Collect specimen using dual-tipped Copan swab.
3. Pass swab deep into abscess, and sample lesion’s advancing
edge taking care to avoid contamination with other normal
flora.
4. Return swab to transport tube (liquid Stuart Media).
5. Label tube with patient’s name (first and last), date and
actual time of collection, and type of specimen.
6. Maintain sterility and forward promptly at ambient temperature
only.
Note: 1. Specimen source is
required on request form for processing.
2. The first swab will be used for PCR testing and the second swab will be used for subsequent testing, if requested.
Superficial Wound
1. Prepare site, wash wound margins well with antiseptic soap, and
rinse with sterile saline.
2. Collect specimen using dual-tipped Copan swab.
3. Break surface of wound and swab exudate.
4. Return swab to transport tube (liquid Stuart Media).
5. Label tube with patient’s name (first and last), date and
actual time of collection, and type of specimen.
Note: 1. Specimen source is required on request form for processing.
2. The first swab will be used for PCR testing and the second swab will be used for subsequent testing, if requested.
Reference Values
Negative
MRSA-positive results will be called on all inpatients and nursing home patients so appropriate isolation protocols can be initiated.
If results are invalid after retesting, the physician or nursing station will be called and laboratory will suggest ordering a routine culture.
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
87641