Abstract
A new method for rapid detection of catalase positive microorganisms by using an ultrasonic measuring method is proposed in this work. The developed technique is based on the detection of oxygen bubbles produced by the hydrolysis of hydrogen peroxide induced by the enzyme catalase which is present in many microorganisms. The bubbles are trapped in a media based on agar gel which was especially developed for microbiological evaluation. It is found that microorganism concentrations of the order of 105 c.f.u./ml can be detected by using this method. The results obtained show up that the proposed method is competitive with other modern commercial methods like luminescence by ATP system. The method can also be used for characterization of enzyme activity.
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