Comparison of Xpert GBS v. culture for rapid detection of group B streptococcus in pregnant women : sensitivity, specificity and predictive values

dc.contributor.authorSaid, Mohamed
dc.contributor.authorDangor, Yusuf
dc.contributor.authorMbelle, Nontombi Marylucy
dc.contributor.authorSihlabela, A.
dc.contributor.authorLekalakala, M.R.
dc.contributor.authorIsmail, Farzana
dc.date.accessioned2019-07-31T11:32:18Z
dc.date.available2019-07-31T11:32:18Z
dc.date.issued2018-12
dc.descriptionThe research described in this article was an MMed project of MS, the main author.en_ZA
dc.description.abstractBACKGROUND. Group B streptococcus (GBS) is a leading cause of invasive disease, particularly in newborns. Seventy-five percent of neonates will be colonised by mothers carrying the organism. Confirmation of maternal colonisation with GBS is essential for prompt treatment and prevention of neonatal sepsis. The current gold standard of culture for isolation of GBS has a disadvantage of long turnaround time (24 - 72 hours). Rapid assays are required to determine maternal carriage of GBS. OBJECTIVES. To determine the usefulness of the Xpert GBS technology v. culture methods to detect GBS carriage in pregnant women. METHODS. This was a prospective observational study of 284 pregnant women between 26 and 37 weeks’ gestation. Two vaginorectal swabs were collected from each participant. One swab was processed using the gold-standard culture method, while the second swab was processed using the Xpert GBS assay. The performance of the Xpert GBS assay was then compared with that of the culture method. RESULTS. Two swabs were processed from each of 284 pregnant women between 26 and 37 weeks’ gestation. Culture detected 70 GBS isolates from a total of 279 specimens (25.1%), whereas the Xpert GBS detected 66 positive specimens (23.7%). The Xpert GBS assay had a sensitivity of 87% and specificity of 98%, with a positive predictive value of 92% and a negative predictive value of 96%. CONCLUSIONS. The Xpert GBS assay is a rapid and sensitive tool for prenatal detection of GBS. The assay should ideally be available in every labour ward, where women can be screened for GBS on arrival.en_ZA
dc.description.departmentMedical Microbiologyen_ZA
dc.description.departmentObstetrics and Gynaecologyen_ZA
dc.description.librarianam2019en_ZA
dc.description.sponsorshipA National Health Laboratory Services Research Grant (no. 94443) in fulfilment of MS’s MMed project.en_ZA
dc.description.urihttp://www.samj.org.zaen_ZA
dc.identifier.citationSaid, M., Dangor, Y., Mbelle, N. et al. 2018, 'Comparison of Xpert GBS v. culture for rapid detection of group B streptococcus in pregnant women: Sensitivity, specificity and predictive values', South African Medical Journal, vol. 108, no. 12, pp. 1032-1035.en_ZA
dc.identifier.issn0256-9574 (print)
dc.identifier.issn2078-5135 (online)
dc.identifier.other10.7196/SAMJ.2018.v108i12.13079
dc.identifier.urihttp://hdl.handle.net/2263/70843
dc.language.isoenen_ZA
dc.publisherHealth and Medical Publishing Groupen_ZA
dc.rights© 2019, South African Medical Association. All rights reserved. This article is licensed under a Creative Commons Attribution-NonCommercial Works License (CC BY-NC 3.0).en_ZA
dc.subjectInvasive diseaseen_ZA
dc.subjectNewbornsen_ZA
dc.subjectMothersen_ZA
dc.subjectGroup B streptococcus (GBS)en_ZA
dc.titleComparison of Xpert GBS v. culture for rapid detection of group B streptococcus in pregnant women : sensitivity, specificity and predictive valuesen_ZA
dc.typeArticleen_ZA

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Said_Comparison_2018.pdf
Size:
153.69 KB
Format:
Adobe Portable Document Format
Description:
Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description: