PyelonephritisPyelonephritis, XanthogranulomatousInflammationCystitisEscherichia coli InfectionsTechnetium Tc 99m Dimercaptosuccinic AcidUrinary Tract InfectionsVesico-Ureteral RefluxBacteriuriaEmphysemaAcute DiseaseKidney Papillary NecrosisProteus InfectionsPyelitisInflammation MediatorsKidneyCicatrixSuccimerUrineKidney PelvisAdhesins, Escherichia coliFimbriae, BacterialEscherichia coliCeftriaxoneDisease Models, AnimalProteus mirabilisUrographyPregnancy Complications, InfectiousAnti-Infective Agents, UrinaryPyelocystitisUrinary TractAnti-Bacterial AgentsUrolithiasisMice, Inbred C57BL