CitrobacterCitrobacter freundiiCitrobacter rodentiumCitrobacter koseriEnterobacteriaceae InfectionsEscherichiaEnterobacteriaceaeTyrosine Phenol-LyaseHospitals, TeachingHospitals, UniversitySerratiaHospitals, Generalbeta-LactamasesHospital CostsHospitals, UrbanNursing Staff, HospitalCephalosporinaseEconomics, HospitalEnterobacterHospitals, PediatricAnti-Bacterial AgentsHospital Bed CapacityHospitals, SpecialHospitals, DistrictMicrobial Sensitivity TestsHospitals, PrivateFinancial Management, HospitalUranium CompoundsSerratia InfectionsEmergency Service, HospitalLength of StayHospital PlanningProteusHospital ChargesBacteriaKlebsiellaGram-Negative BacteriaHospital DepartmentsHospitalizationHospitals, PsychiatricRetrospective StudiesCephalosporinsCross InfectionColonHospital RecordsHospital Unitsbeta-LactamsEscherichia coliEnterobacter cloacaeEquipment and Supplies, HospitalDNA, BacterialLibraries, HospitalBacterial Proteinsbeta-Lactam ResistanceColitisDrug Resistance, MicrobialSurgery Department, HospitalPatient AdmissionPatient DischargeHospitals, CountyOutpatient Clinics, HospitalHospital Bed Capacity, 500 and overCefotaximeColonic DiseasesCeftazidimeAmerican Hospital AssociationGenes, BacterialSalmonellaDicloxacillinHospitals, MunicipalBrain AbscessFood Service, HospitalTime FactorsHospital Information Systems