Screening for maternal colonization with Streptococcus agalactiae at 36 to 37 weeks gestation as a guide for intrapartum antibiotic prophylaxis to decrease the risk of infection by S agalactiae (group B streptococcus) in the infant
This test is utilized to assess for the presence of Streptococcus agalactiae (group B streptococcus) in pregnant women.
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 |
STRP | Identification Streptococcus | No, (Bill Only) | No |
ISAE | Aerobe Ident by Sequencing | No, (Bill Only) | No |
SIDC | Ident Serologic Agglut Method 4 | No, (Bill Only) | No |
When this test is ordered, the reflex tests may be performed and charged.
Conventional Culture Technique
87346-CGBS
Beta-Hemolytic Strep
Strep Group B
Group B streptococcus
Group B streptococci
S. agalactiae
Streptococcus agalactiae
Beta Strep
SGB
GBS
When this test is ordered, the reflex tests may be performed and charged.
Varies
Specimen must arrive within 24 hours of collection.
Specimen source is required.
Supplies: Culturette (BBL Culture Swab) (T092)
Specimen Type: Swab
Sources: Vaginal/rectal combination swab
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:
Vaginal/rectal combination swab is the only acceptable specimen according to American College of Obstetricians and Gynecologists (ACOG) guidelines. Vaginal only, rectal only, as well as other sources are not acceptable.
Other | Dry swab |
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Varies | Ambient (preferred) | 24 hours | |
Refrigerated | 24 hours |
Screening for maternal colonization with Streptococcus agalactiae at 36 to 37 weeks gestation as a guide for intrapartum antibiotic prophylaxis to decrease the risk of infection by S agalactiae (group B streptococcus) in the infant
When this test is ordered, the reflex tests may be performed and charged.
Streptococcus agalactiae (group B streptococcus) is a cause of morbidity and mortality among infants. Infections occurring within the first week of life are considered early-onset; those occurring in infants greater than 1 week of age are considered late-onset. Maternal vaginal or rectal colonization with S agalactiae is a risk factor for early-onset disease in infants. Ten to 30% of pregnant women are vaginally or rectally colonized with S agalactiae and may transmit the organism to their infant during labor and delivery. The American College of Obstetricians and Gynecologists recommends screening for colonization with S agalactiae at 36 to 37 weeks gestation as a guide for intrapartum antibiotic prophylaxis to decrease the risk of infection with Streptococcus agalactiae in the infant.
Negative
Positive cultures are reported out as Streptococcus agalactiae
No significant cautionary statements
Prevention of Group B Streptococcal Early-Onset Disease in Newborns: American College of Obstetricians and Gynecologists Committee Opinion. July 2019;(134):1. https://www.acog.org/Clinical-Guidance-and-Publications/Committee-Opinions/Committee-on-Obstetric-Practice/Prevention-of-Group-B-Streptococcal-Early-Onset-Disease-in-Newborns
Swabs are cultured to a sheep blood agar plate, a Columbia colistin-nalidixic acid agar plate, and a LIM broth. Cultures are incubated for 2 to 3 days, depending on microbial growth present. Streptococcus agalactiae is identified using one or a combination of the following techniques: matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry, conventional biochemical tests, latex antigen test, and nucleic acid sequencing of the 16S ribosomal RNA (rRNA) gene. Streptococcus agalactiae or no growth of S agalactiae is reported.(Church DL: Group B Streptococcus Cultures. In Clinical Microbiology Procedures Handbook. Edited by AL Leber. Washington DC, ASM Press, 2016, section 3.9.2)
Monday through Sunday
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.
87081-Strep Grp B (S. agalactiae) 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)
Test Id | Test Order Name | Order LOINC Value |
---|---|---|
CGBS | Grp B Strep (S. agalactiae) Culture | 586-8 |
Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
---|---|---|
CGBS | Grp B Strep (S. agalactiae) Culture | 586-8 |