Clavulanic AcidAmoxicillin-Potassium Clavulanate CombinationAmoxicillinAnti-Bacterial AgentsClavulanic AcidsOtitis MediaMicrobial Sensitivity Testsbeta-Lactamsbeta-LactamasesPotassiumHaemophilus influenzaeAzithromycinPenicillinsDrug Therapy, CombinationDrug Resistance, BacterialCommunity-Acquired InfectionsStreptococcus pneumoniaePenicillanic AcidSulbactamPenicillin ResistanceRespiratory Tract InfectionsHaemophilus InfectionsThienamycinsPneumonia, PneumococcalDrug Resistance, Multiple, BacterialClarithromycinbeta-Lactam ResistanceAmpicillinPotassium ChannelsTicarcillinAcute DiseaseMetronidazoleCefuroximeCephalosporinsLactamsHelicobacter pyloriDouble-Blind MethodSpainTreatment OutcomePiperacillinHelicobacter InfectionsDrug Administration ScheduleActinomycetaceaeOmeprazoleCefotaxime2-PyridinylmethylsulfinylbenzimidazolesEnterobacteriaceaeCephalosporinaseDrug Resistance, MicrobialBacteria, AnaerobicBronchitis, ChronicMoraxella (Branhamella) catarrhalisAnti-Infective AgentsAnti-Ulcer AgentsEnterobacteriaceae InfectionsLansoprazoleBacterial InfectionsAmdinocillinFurazolidoneAdministration, OralKlebsiella pneumoniaeCephalosporin ResistanceDrug CombinationsUrinary Tract InfectionsRabeprazoleGram-Negative BacteriaPneumonia, BacterialPotassium Channel BlockersKlebsiellaPotassium Channels, Inwardly RectifyingCeftazidimePotassium, DietaryPotassium DeficiencyBismuthCefaclorPotassium Channels, Voltage-GatedIsoelectric FocusingEscherichia coliPotassium Compounds