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Test Code CGAS Group A Streptococcus (Streptococcus pyogenes) Culture, Varies


Ordering Guidance


Throat cultures are not recommended for routine detection of Streptococcus pyogenes. Instead, rapid nucleic acid amplification testing should be ordered; see GAPCR / Streptococcus Group A, Molecular Detection, PCR, Throat. If this test is ordered on a throat swab, testing will be changed to GAPCR.



Necessary Information


Specimen source is required.



Specimen Required


Specimen Type: Rectal, perirectal, perianal, or anal

Supplies: Culturette (BBL Culture Swab) (T092)

Container/Tube: Culture transport swab (Dacron or rayon swab with aluminum or plastic shaft with either Stuart or Amies liquid medium)

Specimen Volume: Swab

Additional Information: Primarily to be collected from pediatric patients


Useful For

Diagnosing perianal cellulitis

 

Screening patients and healthcare workers for Streptococcus pyogenes for the purpose of investigating possible nosocomial transmission

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
RMALD Ident by MALDI-TOF mass spec No, (Bill Only) No
GID Bacteria Identification No, (Bill Only) No
ISAE Aerobe Ident by Sequencing No, (Bill Only) No
SIDC Ident Serologic Agglut Method 4 No, (Bill Only) No

Testing Algorithm

When this test is ordered, the reflex tests may be performed at an additional charge.

Method Name

Conventional Culture Technique

Reporting Name

Grp A Strep (S. pyogenes) Culture

Specimen Type

Varies

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Ambient (preferred) 24 hours
  Refrigerated  24 hours

Reject Due To

Dry swab Reject

Reference Values

Negative

Performing Laboratory

MCHS- Mankato

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

87081-Strep Grp A (S. pyogenes) culture

87077-Ident by MALDI-TOF mass spec (if appropriate)

87077-Bacteria identification (if appropriate)

87077-Identification Streptococcus (if appropriate)

87147 x 2-6-Serologic Agglut Method 4 Ident (if appropriate)

87153-Aerobe ident by sequencing (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CGAS Grp A Strep (S. pyogenes) Culture 17656-0

 

Result ID Test Result Name Result LOINC Value
CGAS Grp A Strep (S. pyogenes) Culture 17656-0

Day(s) Performed

Monday through Sunday

Report Available

2 to 5 days