The Range of diameters of inhibition zone coincide with judge criterion at all during inhibition\testing of Sensitabs usde three strains of international calibration. The Discrete rate is 100% whencomparation with Denmark Sensitabs. The Difference .between diameters of inhibition zones of sensitabs is 1-2 mm, but the difference between diameters of inhibition zones of paper discs is 9-13mm when comparating with paper diScs. So the homogenizition of testing giblets is up to stunderd thatof testing paper disc...