PenicillinsDrug DiscoveryPenicillin GAnti-Bacterial AgentsPenicillin VPenicillin ResistanceMicrobial Sensitivity TestsAnti-Infective AgentsDrug Resistance, BacterialPenicillin G ProcaineDrug DesignAntimicrobial Cationic PeptidesPenicillin AmidasePenicillin G BenzathineDrug Resistance, MicrobialDrug Resistance, Multiple, BacterialBacteriaVeterinary DrugsDrug Evaluation, PreclinicalStaphylococcus aureusStreptococcus pneumoniaeEscherichia coliAmpicillinGram-Positive BacteriaBacterial InfectionsDrug UtilizationSmall Molecule LibrariesHigh-Throughput Screening AssaysGram-Negative BacteriaPropolisPneumococcal InfectionsErythromycinTrimethoprim-Sulfamethoxazole CombinationBacterial ProteinsGentamicinsStaphylococcusPharmaceutical PreparationsBiological ProductsFluoroquinolonesMolecular Sequence DataPenicillin-Binding ProteinsPseudomonas aeruginosaIntraabdominal InfectionsPenicillinaseEnterobacteriaceaeSelf MedicationStaphylococcal InfectionsDrug IndustrySalmonella InfectionsCross InfectionCommunicable Diseases, EmergingCommunity-Acquired Infectionsbeta-LactamasesCephalosporinsGram-Positive Bacterial InfectionsCulture MediaModels, MolecularSerotypingCiprofloxacinEscherichia coli InfectionsAmino Acid SequenceAnti-Infective Agents, UrinaryMolecular StructureUrinary Tract InfectionsDrug Resistance, MultipleSalmonellaTriclosanDatabases, PharmaceuticalNeisseria gonorrhoeaeColony Count, MicrobialMuramoylpentapeptide CarboxypeptidaseAminoglycosidesMethicillin ResistanceBacteremiaChloramphenicolStreptococcal InfectionsCombinatorial Chemistry TechniquesGram-Negative Bacterial InfectionsAntifungal AgentsSalmonella entericaVancomycinStructure-Activity RelationshipDNA, BacterialPlant ExtractsGovernment ProgramsCrystallography, X-RayPeptidyl TransferasesHexosyltransferasesDrug RepositioningDrug SynergismCathelicidinsPharmacologybeta-DefensinsMutationTime FactorsDatabases, ChemicalFecesRespiratory Tract InfectionsPharmacokineticsDisk Diffusion Antimicrobial Tests