title: [Choice and selection of a Staphylococcus saprophyticus strain--a urease producer].
abstract: A new strain of Staphylococcus saprophyticus was isolated from natural sources. The strain has a higher activity of urease comparing to other cultures producing the enzyme. The strain is referred to as S. saprophyticus L-1. The natural variability of the strain was studied and the population was shown to have only one morphological type of colonies. The homogeneous population reversed to R and S forms after storage under vaseline oil. Although S forms had a lower viability, they produced more urease under the conditions of submerged cultivation than R forms. As the result of selection among S form colonies, three variants which retained the ability to synthesize urease at a high rate upon many passages were isolated.
mesh_terms: D000391:Air Microbiology; D000818:Animals; D001431:Bacteriological Techniques; D014644:Genetic Variation; D008372:Manure; D012641:Selection, Genetic; D012722:Sewage; D013210:Staphylococcus / Q000201:enzymology / Q000235:genetics* / Q000302:isolation & purification; D013552:Swine / Q000382:microbiology; D014510:Urease / Q000096:biosynthesis*; D001743:Urinary Bladder / Q000382:microbiology
chemical_list: D008372:Manure; D012722:Sewage; D014510:Urease
vernacular_title: Otbor i selektsiia shtamma Staphylococcus saprophticus--produtsenta ureazy.