[Signal identification of potentially pathogenous Yersinia]

A four-tube method with diagnostic nutrient media is proposed for differentiating between pathogenic and apathogenic Yersinia. Yersinia cultures are detected by inoculating typical or suspected colonies from solid media to media with lactose, glucose, urea, and indicators. Subsequent culturing in three other media (with sucrose and sorbitol, with esculin, rhamnose, and salicin, and with pyrasinamide) and the use of appropriate indicators help detect potentially pathogenous pseudotuberculous and enteric Yersinia of 1B, 2, 3, and 5 biovars from apathogenic species and variants. The method is simple, rapid, economic, reliable, and is recommended for clinical laboratory diagnosis.