InfectionAntirheumatic AgentsOpportunistic InfectionsBacterial InfectionsAnti-Bacterial AgentsAdministration, BuccalArthritis, RheumatoidClinical Chemistry TestsTreatment OutcomeDrug Therapy, CombinationImmunologic FactorsSkin Diseases, InfectiousImmunocompromised HostEnterobacteriaceae InfectionsMicrobial Sensitivity TestsThienamycinsMethotrexateCephradineBacteremiaBelgiumCommunicable DiseasesRisk FactorsGram-Positive Bacterial InfectionsSepsisCilastatinPyelonephritisSeverity of Illness IndexMinocyclineMeningitisCeftriaxoneHematologic TestsAztreonamAntibodies, Monoclonal, HumanizedInfant, NewbornProspective StudiesRetrospective StudiesAntibodies, MonoclonalDisabled PersonsAbortifacient Agents, NonsteroidalFollow-Up StudiesTime FactorsOsteomyelitisCross InfectionMoxalactamStaphylococcal InfectionsUnited StatesDepressionTumor Necrosis Factor-alphaColistinAcetamidesDouble-Blind MethodOxazolidinonesAcinetobacter baumanniiStreptococcal InfectionsPneumoniaCefotaximeFeverHospitalizationImmunoconjugatesQuestionnairesSymptom AssessmentAminoglycosidesCohort StudiesCarbapenemsEndocarditis, BacterialStaphylococcus aureusImipenemIncidenceVancomycinPseudomonas aeruginosaGlucocorticoidsAnti-Infective AgentsPediatricsDrug Resistance, MicrobialMisoprostolPseudomonas InfectionsVancomycin ResistanceGram-Negative Bacterial InfectionsPatient CareCephalosporinsRiskPiperacillinImmunoglobulin GAntibodies, Monoclonal, Murine-DerivedAcute DiseaseReceptors, Tumor Necrosis FactorDrug Resistance, Multiple, BacterialGram-Negative BacteriaImmunosuppressive AgentsLaboratoriesAcinetobacter InfectionsUrinary Tract InfectionsEnterobacteriaceaePrevalenceDrug Resistance, BacterialGreat BritainStaphylococcusPneumonia, BacterialAntibiotic ProphylaxisMethicillin-Resistant Staphylococcus aureus