Recommended CRM for process control
    CRM-EC O.157
  • Escherichia coli serotype O157:H7 (non-toxigenic)
  • WDCM 00014
Can also be used for performance testing
    CRM-EC O.157
  • Escherichia coli serotype O157:H7 (non-toxigenic)
  • WDCM 00014

Good growth (2)
Transparent colonies with a pale yellowish-brown appearance and a diameter ~1 mm

  • WDCM 00034

Total inhibition (0)

  • WDCM 00012

Partial inhibition (1)
Growth of some pink colonies

Tryptone/Tryptophan medium with indole reagent (kovacs reagent)
  • WDCM 00012

Positive reaction:
Formation of a red ring within 10 min

  • WDCM 00006

Negative reaction:
Yellow/brown ring within 10 min

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Biosisto - Quality in Control

Microbiological laboratories should be able to receive reliable analysis without much overhead. A microbiological analyst must be able to focus on the primary activities, for example analysis of the sample material. Quality control should support the analyst in a logical and simple manner. By using modern information technology, process control and quality assurance are designed smarter and more effective.

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