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[Determination of bacteriocinogenic types of strains of Proteus mirabilis].

The study was aimed at determination of bacterioenzymogenic activity of 351 Proteus strains (337 strains of Proteus mirabilis and 14 strains of Proteus Vulgaris) isolated in laboratory of Pediatric Institute of the Medical Academy in Lódź, mostly from urine (222 strains) and feces (99 strains). for determination of bacteriocinogenic properties, 15 index strains "S" were used. Of these, six were from collection of Senior (The University of Dundee Medical School, Scotland) and 9 from own Piatkowski collection (Lódź University). Detection of bacteriocinogenic strains and determination of their activity toward 15 index strains was performed by an own method (15). Out of total 551 strains tested, bacteriocinogenic properties were found in 263 (75%) of strains. Remaining 88 (25%) strains did not inhibit any of the 15 index strains. Sixty-two different types of bacteriocinogenicity were found. The results suggest that bacteriocinogenic typing of Proteus mirabilis strains permits for more precise characterization of properties of these bacteria useful for epidemiological purposes, than by application of other methods.