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Carrot Broth One Step for Group B Strep

Every life deserves an opportunity to grow and thrive.

Better tests enable you to provide just that.

Our exclusive Carrot Broth™ One-Step system allows for faster results for the cultivation
and identification of beta-hemolytic strains of Group B Streptococcus in pregnant women.

Compared to conventional methods, it's not even close!

When compared to molecular and reference culture methods, Carrot Broth™ significantly streamlines the work load and time necessary to accurately identify GBS colonization in pregnant women.

This exclusive, one-step test features greater sensitivity and decreased time to results, which lowers overall costs.

A clear, chromogenic reaction as early as 16 hours after inoculation will tell you everything you need to know. Clinical testing of Carrot Broth One-Step demonstrated a sensitivity of 98.8% and a specificity of 98.2% for the recovery of Group B Streptococcus from patient specimens when compared to LIM Broth. Positive results do not require additional work ups!

Carrot Broth test tube

The advantages are clear.

  • Easy one-step process! Place the patient specimen directly into the media.
  • Development of any orange to red color indicates a positive result.
  • For positives, there is no need for further subculturing to confirm.
  • Significantly lower cost when compared to the PCR method.
  • Carrot Broth was found to be more sensitive than LIM Broth and even PCR!
  • Negative cultures from Strep B Carrot Broth should be subcultured on our GBS Detect agar plate (Cat. No. A300) to detect weakly or non-hemolytic strains of GBS.
  • Carrot Broth One Step is available in multiple formats that work on many automated inoculating machines.
Carrot Broth Positive and Negative

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GBSDetect A300

GBS Detect™ for Weakly or Non-Hemolytic Strains

GBS Detect™ is recommended for the isolation and detection of weakly or non-hemolytic Group B Streptococci by inducing beta-hemolysis upon subculture from enrichment broth procedures such as Strep B Carrot Broth™ media or LIM Broth. GBS Detect™ contains special hemolysis-enhancing supplements that cause otherwise non-hemolytic strains of GBS to appear as beta-hemolytic, thus increasing the sensitivity of methods used to detect GBS colonization.

StrepPRO™ Streptococcal Grouping Kit

Hardy Diagnostics StrepPRO™ Grouping Kit provides a rapid latex agglutination method for the serological identification of Lancefield’s groups A, B, C, D, F, and G from isolated colonies of beta-hemolytic Streptococcus spp. and Enterococcus faecalis.

MBL Kwiksticks

Microbiologics™ Control Organisms

KwikStik™ by Microbiologics™ provides simple, reliable QC microorganisms in a ready to use format. Its all in one design reduces the risk of contamination. Online Certificate of Analysis provides detailed strain information and traceability to reference cultures ensures authenticity. Streptococcus agalactiae (Cat. no. 0439P & 0439K) and Streptococcus pyogenes, Group A (Cat. no. 0385K) are both available in this format.

Evaluation of New Strep B Carrot BrothTM One-Step in the Detection of Group B Streptococcus: A Multi-Center Study, Presented at ASM 2017 New Orleans. view
Carrot Broth™ Comparison – Schreckenberger view
Comparison of Commercially Available Methods (Strep B Carrot Broth™ and GBS Medium) for the Detection of Group B Streptococcus view
Strep B Carrot Broth™ Transport Swab Inoculation Study view
CDC Guidelines
CDC Flowcharts for 2010 Guidelines for Laboratorians

Using pigmented broth and only subculture for isolation and identification of GBS

CDC Flowcharts for 2010 Guidelines for Laboratorians

Using pigmented broth and serologic or molecular testing for identification of GBS

CDC GBS Guideline view
CDC Prevention of Perinatal Group B view


US Patent No. 8,313,938 B1 and US Patent No. 8,518,688 B1.