Group B Streptococcus Colonization Detection Culture With Reflex to Susceptibilities
Also known as: Culture, Genital, Group B β-Hemolytic Streptococcus, Genital β-Hemolytic Culture, Group B, β-Hemolytic Streptococcus Culture, Group B Only, Any Source
Use
Isolate and identify group B β-streptococci
Special Instructions
Collection of both a vaginal and rectal swab specimen is strongly recommended to maximize sensitivity. Cervical, perianal, perirectal, or perineal specimens are not acceptable, and a speculum should not be used for culture collection. Reflex susceptibility testing to clindamycin and erythromycin is recommended only for those patients at high risk for anaphylactic shock due to penicillin allergy.
Limitations
Susceptibility testing is not routinely performed because all group B Streptococcus are universally susceptible to penicillin. Reflex susceptibility testing to clindamycin and erythromycin is performed only for patients at high risk for anaphylaxis with penicillin allergy. Erythromycin is no longer an acceptable alternative for intrapartum GBS prophylaxis for penicillin-allergic women at high risk for anaphylaxis.
Methodology
Culture-based
Biomarkers
LOINC Codes
- 547-0
- 547-0
Result Turnaround Time
2-6 days
Related Documents
For more information, please review the documents below
Specimen
Vaginal Swab
Volume
Single or double bacterial swab in Amies agar gel transport, ESwab® or equivalent
Minimum Volume
Single bacterial swab in Amies agar gel transport, ESwab® or equivalent
Container
Bacterial Cult Trans Swab with Media or ESwab®
Collection Instructions
Swab the lower vagina (vaginal introitus), followed by the rectum using the same swab. Move swab from side to side, or rotate the swab at the collection site, allowing several seconds for absorption of organisms by the swab.
Storage Instructions
Maintain specimen at room temperature.
Causes for Rejection
Inappropriate specimen transport; inappropriate transport conditions; improper labeling; specimen received after prolonged delay (more than 48 hours); cervical/endocervical, perianal, perirectal or perineal specimen or any source other than vagina and rectum
Other tests from different labs that may be relevant