Covid-19 Statement

In accordance with government guidelines we are asking non essential employees to work from home. Therefore we are only able to manage limited incoming phone calls and enquiries.

Please use this link and our team will respond as soon as they can.




Sigma GBS™ is one of the latest innovations from MWE and is a swab based device for the direct collection and rapid processing of specimens screening for Streptocccus agalactiae.

The product includes a 2ml vial of Lim broth (for the enrichment of Group B Streptococcus) and a swab which can be snapped into the vial. After collecting the specimen, the vial can be incubated for a few hours before inoculation onto a chromogenic agar medium for the direct detection and identification of Streptocccus agalactiae.

Recommended applications

Screening for Streptocccus agalactiae is normally performed in late pregnancy. The swab is used to collect specimen(s) in normal way from vagina and/or rectum.


  • Lim Broth Medium
  • Enrichment of specimens ready for direct plating on chromogenic agar
  • Interfering bacteria inhibited, including E. coli
  • Liquid format compatible with automated processing platforms


  • Simpler processing and faster turnaround
  • Convenient Snap ‘n’ Cap format for easy specimen handling.
  • Convenient format for screening for Group B Streptococcus colonisation



Product option(s):

Code Name Colour Length Quantity Pack size No. in case Shelf life
MWGBS Sigma GBS™ with 2ml medium, with standard Sigma swab (cellular foam tip) Turquoise 15cm 1 125 1000 6 months
MWGBST Sigma GBS™ with 2ml medium– Tube only Turquoise 1 50 6 months
MWGBSPF Sigma GBS™ with 2ml medium, standard Purflock® tip Light Blue 15cm 1 125 1000 6 months