β-Strep (Group B) Antigen

CPT: 87802
Print Share

Test Details

Synonyms

  • Beta-Strep (Group B) Antigen

Use

Aid in documentation of active beta streptococcal infection

Methodology

Latex agglutination (LA)

Reference Interval

Negative

Additional Information

Group B Streptococcus is currently one of the most significant human pathogens in the neonatal period. The most common mode of acquisition by the neonate is exposure to the maternal genital flora in utero through ruptured membranes or by contamination during passage through the birth canal. Rapid identification of group B Streptococcus carriers is important in management of premature rupture of the membranes because the effectiveness of intrapartum prophylactic ampicillin may be compromised by awaiting the results of conventional cultures. Infection is manifested in two major forms, early onset septicemic infection manifest in the first few days of life and late onset meningitis which occurs during the first few months of life.

Increased isolation of strains of group B Streptococcus resistant to erythromycin (9%) or intermediate susceptible clindamycin (9.5%) and cefoxitin (15.3%) have been reported. Nineteen percent exhibited a multiple antibiotic resistance pattern. Penicillinase production and resistance to ampicillin were not encountered in the particular series. Susceptibility testing may be useful in selecting alternate antibiotic regimens.

Specimen Requirements

Specimen

Serum, urine (random), or cerebrospinal fluid (CSF)

Volume

1 mL serum, 5 mL urine, or 0.5 mL CSF

Container

Red-top tube or gel-barrier tube, plastic urine container, or sterile plastic (CSF) tube

Collection

Indicate source of specimen.

Storage Instructions

Refrigerate.

Clinical Information

Special Instructions

Submit only one specimen per test request form. State source.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
018804 Beta Strep (Group B) Antigen 20459-4 018804 Beta Strep (Group B) Antigen 20459-4

For Providers

Please login to order a test.

 

© 2017  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2017, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf