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Beaumont Laboratory


Streptococcus pyogenes, Group A Strep Antibody, Hyaluronidase Antibody, ARUP #50642, EPIC: LAB6155, SOFT: XSTZ

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One Lavender-top EDTA tube or plain Red-top tube.

Physician Office/Drawsite Specimen Preparation

Centrifuge to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum or plasma, refrigerated (2-8°C or 36-46°F). (Min: 0.05 mL)

Rejection Criteria

  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 48 hours
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 1 year

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.


Sent to ARUP Laboratories, Salt Lake City, UT.


Monday, Wednesday, Friday.
Results available in 2-5 days.

Reference Range

Streptococcus pyogenes, Group A Antibody (Streptozyme Screen) nondetected: Negative.
Streptococcus pyogenes, Group A Antibody (Streptozyme Titer) less than 100 STZ units: Negative.

Test Methodology

Semi-Quantitative Hemagglutination.

Reflex Testing

All positive results will be titered at additional charge.

CPT Code

86403 (Screen). Add 86406 for Streptococcus titer, if reflexed.

Test Codes

ARUP #50642, EPIC: LAB6155, SOFT: XSTZ

Last Updated


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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.