What Is Group A Streptococcus (Strep A)?

What it is

Streptococcus pyogenes antigen

Why it matters

Rapid diagnosis of strep throat.

Specimen

Swab

Interpretation

Positive = Strep A present

Limitations

Culture is reference

Related test: Strep A Rapid Test — specimen: Throat swab

Frequently Asked Questions

What does a positive Strep A test mean? Group A Streptococcus is present — culture is the reference.

Related knowledge

References

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Last reviewed: 2026-09-12