[The pyrazinamidase activity of bacteria of the genus Yersinia]

A modified nutrient medium, made of reagents and standard media manufactured in this country, tried in practice, is suggested for Yersinia pyrazinamidase test. Tisamid (Finland), a pyrazinamide antituberculosis agent was used as substrate. A positive test is characteristic of nonpathogenic and a negative one for pathogenic Yersinia. The test and the medium may be effectively used in laboratory diagnostic studies for identification of Yersinia.