title: Struvite crystal precipitation by different phenotypes of Yersinia.
abstract: Extracellular formation of struvite crystals by Yersinia enterocolitica, Y. frederiksenii, Y. kristensenii and Y intermedia strains was investigated. Precipitation of crystalline structures was found with 19 of the 187 strains tested, its formation being more frequently observed at 25 degrees C than at 37 degrees C. Production of struvite was greater in Y. enterocolitica strains belonging to biotype 1, serogroup 0:7,8 and lysotype Xz, than observed in other phenotypes. Quantitative assay in a liquid medium showed that struvite formation began after 3 d of incubation; production of these crystals increased up to 15 d. Crystalline structures were examined using electron microscopy and their extracellular formation was observed.
authors.affiliation: Departamento de Microbiología, Facultad de Farmacia, Universidad de Granada, Spain.
authors.forename: M A
authors.initials: MA
authors.lastname: Rivadeneyra
authors.forename: I
authors.initials: I
authors.lastname: Perez Garcia
authors.forename: C
authors.initials: C
authors.lastname: Calvo
authors.forename: A
authors.initials: A
authors.lastname: Ramos-Cormenzana
mesh_terms: D003460:Crystallization; D008274:Magnesium / Q000378:metabolism*; D017616:Magnesium Compounds; D010641:Phenotype; D010710:Phosphates / Q000378:metabolism*; D000069877:Struvite; D015007:Yersinia / Q000235:genetics / Q000378:metabolism*
chemical_list: D017616:Magnesium Compounds; D010710:Phosphates; D000069877:Struvite; D008274:Magnesium