InfectionAntirheumatic AgentsOpportunistic InfectionsBacterial InfectionsAnti-Bacterial AgentsAdministration, BuccalArthritis, RheumatoidClinical Chemistry TestsDrug Therapy, CombinationImmunologic FactorsSkin Diseases, InfectiousEnterobacteriaceae InfectionsThienamycinsMicrobial Sensitivity TestsImmunocompromised HostCephradineMethotrexateBacteremiaGram-Positive Bacterial InfectionsCilastatinSepsisPyelonephritisBelgiumCommunicable DiseasesTreatment OutcomeMinocyclineCeftriaxoneMeningitisAztreonamHematologic TestsAntibodies, Monoclonal, HumanizedAbortifacient Agents, NonsteroidalAntibodies, MonoclonalMoxalactamOsteomyelitisCross InfectionColistinStaphylococcal InfectionsAcetamidesAcinetobacter baumanniiOxazolidinonesTumor Necrosis Factor-alphaCefotaximeImmunoconjugatesAminoglycosidesDouble-Blind MethodStreptococcal InfectionsCarbapenemsImipenemVancomycinEndocarditis, BacterialStaphylococcus aureusPneumoniaPseudomonas aeruginosaInfant, NewbornMisoprostolVancomycin ResistancePseudomonas InfectionsDrug Resistance, MicrobialPiperacillinCephalosporinsAnti-Infective AgentsPediatricsGram-Negative Bacterial InfectionsFeverPatient CareAntibodies, Monoclonal, Murine-DerivedGlucocorticoidsAcinetobacter InfectionsReceptors, Tumor Necrosis FactorDrug Resistance, Multiple, BacterialGram-Negative BacteriaEnterobacteriaceaeLaboratoriesImmunosuppressive AgentsHospitalizationImmunoglobulin GStaphylococcusUrinary Tract InfectionsDrug Resistance, BacterialGentamicinsMethicillin-Resistant Staphylococcus aureusPneumonia, BacterialRetrospective StudiesAntibiotic ProphylaxisKlebsiella pneumoniaeRiskMethicillin ResistanceRisk FactorsGram-Positive Bacteriabeta-LactamasesNeutropeniaCritical CareStreptococcus pneumoniaeDiagnostic Tests, RoutineAcute DiseaseGreat BritainBacteriaSeverity of Illness IndexDrug Administration Schedule