Patent ID: 7309580

Claim:
A plating medium for the presumptive identification of Bacillus cereus, Bacillus thuringiensis and/or Bacillus anthracis comprising a nutrient base to facilitate growth of Bacillus cereus, Bacillus thuringiensis and/or Bacillus anthracis , a first-chromogenic substrate that changes the color of the medium to a first color responsive to the presence of phosphatidylcholine-specific phospholipase C (PC-PLC) enzymes, and a second chromogenic substrate that changes the color of the medium to a second color responsive to the presence of phosphatidylinositol-specific phospholipase C (PI-PLC) enzymes of Bacillus thuringiensis and Bacillus cereus , the first and second colors being different and blending to a third color, the first, second and third colors contrasting with each other and with the color of the medium.