Ampicillin ResistanceAmpicillinPlasmidsR FactorsDNA, RecombinantEscherichia coliPenicillin ResistanceDNA, BacterialDNA, CircularDNA Restriction EnzymesConjugation, GeneticHaemophilus influenzaeDrug Resistance, MicrobialCloning, MolecularBase SequenceAnti-Bacterial AgentsEnterococcus faeciumbeta-LactamasesMicrobial Sensitivity TestsNucleic Acid HybridizationDrug Resistance, BacterialGenesPenicillinaseExtrachromosomal InheritanceChloramphenicol ResistancePenicillinsPenicillin-Binding ProteinsTransformation, BacterialDNA, ViralTetracyclineTransformation, GeneticShigella sonneiDrug Resistance, Multiple, BacterialDrug ResistanceHaemophilus ducreyiDNA Transposable ElementsHaemophilus InfectionsTrimethoprimBacterial ProteinsGenes, BacterialEnterobacteriaceaeChromosomes, BacterialPenicillin GMuramoylpentapeptide CarboxypeptidaseMutationStreptomycinSulbactamMolecular Sequence DataPeptidyl TransferasesGram-Positive Bacterial InfectionsHexosyltransferasesSerine-Type D-Ala-D-Ala CarboxypeptidaseRecombination, GeneticDrug Resistance, MultipleDrug Resistance, NeoplasmPivampicillinFecesCulture MediaDisease ResistancePolymerase Chain ReactionVascular ResistanceChloramphenicolGenetic VectorsDrug Resistance, ViralEnterococcus faecalisTetracycline ResistanceGentamicinsbeta-Lactam Resistancebeta-LactamsKanamycinSulfamethoxazoleCephalosporinsAmino Acid SequenceSequence Analysis, DNADysentery, BacillaryPenicillanic AcidErythromycinShigellaSalmonellaCloxacillinPhenotypePlant DiseasesAnti-Infective AgentsCarbenicillinAmoxicillinSalmonella InfectionsCephalexinKlebsiellaEscherichia coli InfectionsElectrophoresis, Gel, Pulsed-FieldDrug Resistance, FungalCiprofloxacinAminoglycosidesRestriction MappingAirway ResistanceStaphylococcus aureusCephaloridineProbenecidBacteriaTrimethoprim-Sulfamethoxazole Combination