Penicillin ResistancePenicillinsAnti-Bacterial AgentsDrug Resistance, BacterialPenicillin GMicrobial Sensitivity TestsDrug Resistance, MicrobialStreptococcus pneumoniaeDrug Resistance, Multiple, BacterialPneumococcal InfectionsPenicillin VPenicillin-Binding ProteinsMuramoylpentapeptide CarboxypeptidaseDrug ResistancePeptidyl TransferasesHexosyltransferasesAnti-Infective AgentsDrug Resistance, MultipleNeisseria gonorrhoeaeSerotypingErythromycinAntimicrobial Cationic PeptidesBacterial ProteinsPenicillinasePenicillin G ProcaineLactamsbeta-LactamasesAmpicillinMacrolidesPenicillin AmidaseBacteriaTetracyclineDNA, BacterialStaphylococcus aureusEscherichia coliGram-Negative BacteriaDrug Resistance, NeoplasmBacterial Infectionsbeta-LactamsElectrophoresis, Gel, Pulsed-FieldPenicillin G BenzathineStreptococcal InfectionsR FactorsStaphylococcusAminoacyltransferasesGenes, BacterialMolecular Sequence DataGram-Positive BacteriaPlasmidsDisease ResistanceCefotaximeCommunity-Acquired InfectionsMutationBacteremiaOxacillinStreptococcusTetracycline ResistanceSalmonellaVascular ResistanceTransformation, BacterialMoraxella (Branhamella) catarrhalisCephalosporinsNasopharynxAntibiotic ProphylaxisAmpicillin ResistanceCiprofloxacinPneumococcal VaccinesEscherichia coli InfectionsCross InfectionGram-Negative Bacterial Infectionsbeta-Lactam ResistanceIntegronsDrug Resistance, ViralShigellaFluoroquinolonesEnterococcusPolymerase Chain ReactionEnterobacteriaceaeDrug UtilizationCarrier ProteinsSalmonella InfectionsRespiratory Tract InfectionsCeftriaxoneTrimethoprim-Sulfamethoxazole CombinationDisk Diffusion Antimicrobial TestsSalmonella entericaCarrier StateBacterial Typing TechniquesHaemophilus influenzaeGentamicinsFecesPseudomonas aeruginosaPneumonia, PneumococcalStaphylococcal InfectionsMolecular EpidemiologyGram-Positive Bacterial InfectionsAminoglycosidesSpainCulture MediaStreptomycin