ISO 21528-2

Horizontal methods for the detection and enumeration of Enterobacteriaceae — Part 2: Colony-count method

Posted - Author Annemarie
Recommended CRM for process control
  • WDCM 00013
Process control CRM-EC - VRBG
Can also be used for performance testing
  • WDCM 00012
Process control CRM-ECO.00012MM - VRBG
Can also be used for performance testing
  • WDCM 00006
Process control CRM-CFREU - VRBG
-
VRBG
  • WDCM 00012
Performance testing CRM-ECO.00012MM - VRBG

PR ≥ 0,5
Pink to red colonies with or without precipitation halo

    CRM-ST
  • Salmonella enterica subsp. enterica serotype Typhimurium
  • WDCM 00031
Performance testing CRM-ST - VRBG

PR ≥ 0,5
Pink to red colonies with or without precipitation halo

  • WDCM 00009

Total inhibition (0)

Glucose agar / O-F medium with overlay
  • WDCM 00013

Positive reaction:
Yellow colour

  • WDCM 00025

Negative reaction:
Growth, but no yellow colour development

Oxidase reagent
  • WDCM 00025

Positive reaction:
Mauve, violet, purple or dark blue colour in the reaction time

  • WDCM 00013

Negative reaction:
No colour change in the reaction time

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