CAYE Broth

CAYE Broth is designed for the culture of pathogenic E. coli to enhance verotoxin production during growth.


The presence of casamino acids and yeast extract promote the growth of verotoxin producing E. coli. The presence of trace elements and resulting high pH value additionally supports the growth and toxin production.




From CAYE Broth (Base), the selective enrichment CAYE broth can be prepared by the addition of CAYE Broth Supplement (1.00051).

CAYE Broth is designed for the culture of pathogenic E. coli to enhance verotoxin production during growth in test samples.

Appearance (clearness): clear
Appearance (colour): brown
pH-value (25 °C): 8.3 - 8.7
Growth (E. coli O157:H7 ATCC 43888): +
Duopath Verotoxin 1 (E. coli O157:H7 ATCC 43888): -
Duopath Verotoxin 2 (E. coli O157:H7 ATCC 43888): -
Growth (E. coli O157:H7 ATCC 43890): +
Duopath Verotoxin 1 (E. coli O157:H7 ATCC 43890): +
Duopath Verotoxin 2 (E. coli O157:H7 ATCC 43890): -
Growth (E. coli O157:H7 ATCC 43889): +
Duopath Verotoxin 1 (E. coli O157:H7 ATCC 43889): -
Duopath Verotoxin 2 (E. coli O157:H7 ATCC 43889): +

We offer two media types: the superior granulated GranuCult^® and the cost-efficient powdered NutriSelect^® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany

NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany