Yes. A high vaginal swab (HVS) can detect Streptococcus species — commonly Group B Streptococcus (Streptococcus agalactiae) and occasionally other streptococci. They may represent normal colonisation or cause infection depending on species, load and symptoms. Identification on HVS guides treatment; in pregnancy, Group B Streptococcus detection often prompts antibiotics during labour to prevent newborn infection.

A Group B Streptococcus (GBS) culture is a lab test of a vaginal and rectal swab to detect Streptococcus agalactiae. A positive result means the bacteria are present—often harmless colonization in the mother but potentially risky to a newborn during delivery; intrapartum antibiotics are usually recommended. A negative result means no GBS was detected at the time of testing (commonly done at 35–37 weeks’ gestation).

If you test positive for group B strep (GBS) during pregnancy, your healthcare team will usually recommend intravenous antibiotics (usually penicillin) during labor to prevent newborn infection. If you’re penicillin‑allergic, alternative antibiotics may be used. Newborns are observed and treated if they show signs of infection. Outside pregnancy, GBS colonization often needs treatment only if it causes symptoms or infection.

Group B Streptococcus (strep B) ranges from harmless colonization to serious invasive disease. In adults it's often mild but can cause bloodstream infections, pneumonia, or skin/soft‑tissue infections in elderly or immunocompromised people. In newborns it can cause sepsis, pneumonia, or meningitis and may be life‑threatening; risk is reduced by screening and intrapartum antibiotics. Prompt treatment of suspected invasive infection is essential.

A high vaginal swab (HVS) culture commonly yields normal lactobacilli and potential pathogens: Gardnerella vaginalis (bacterial vaginosis), anaerobes (Prevotella, Mobiluncus), Group B Streptococcus (Streptococcus agalactiae), Escherichia coli, Staphylococcus aureus, Enterococcus, and genital mycoplasmas/ureaplasmas. Cultures may also show Candida (a fungus). Antibiotic susceptibility testing is often performed to guide therapy.

Confirm streptococcal (Group A Strep) infection by clinical assessment (fever, sudden sore throat, tonsillar exudates, tender anterior cervical nodes, absence of cough) plus lab testing. Use a rapid antigen detection test for quick results; if negative but suspicion remains, send a throat swab for culture or PCR (gold standard). Clinicians decide testing and treatment, especially for children or severe symptoms—seek medical evaluation.