Patent ID: 7235379

Claim:
A medium for the detection/identification of microorganisms with esterase activity comprising a reaction medium (M) and at least one chromogenic or fluorogenic esterase substrate (S), this detection/identification being based essentially on revealing the presence of the esterase activity, wherein the improvement consists in that: the medium for the detection/identification of microorganisms with esterase activity is in a stable, ready-to-use liquid or gel form; and the medium for the detection/identification of microorganisms with esterase activity contains: —A—at least one solubilizer and stabilizer selected from the group consisting of: fatty acid sorbitan esters (FASE), and mixtures of FASE and bile salts; —B—a selective activator of formula (I); in which: R is a tetradecyl, and x is Na; —C—optionally at least one solvent.