Ampicillin ResistanceAmpicillinPenicillin ResistanceR FactorsAnti-Bacterial AgentsMicrobial Sensitivity TestsDrug Resistance, BacterialDrug Resistance, MicrobialHaemophilus influenzaeEnterococcus faeciumbeta-LactamasesEscherichia coliConjugation, GeneticAntimicrobial Cationic PeptidesDNA, BacterialPenicillinasePenicillinsPlasmidsChloramphenicol ResistanceDrug Resistance, Multiple, BacterialPenicillin-Binding ProteinsExtrachromosomal InheritanceAnti-Infective AgentsTetracyclineShigella sonneiDrug ResistanceHaemophilus ducreyiTrimethoprimHaemophilus InfectionsTransformation, BacterialEnterobacteriaceaeTransformation, GeneticPenicillin GGram-Positive Bacterial InfectionsSulbactamDNA Transposable ElementsMuramoylpentapeptide CarboxypeptidaseStreptomycinBacterial ProteinsPeptidyl TransferasesHexosyltransferasesSerine-Type D-Ala-D-Ala CarboxypeptidaseDrug Resistance, MultipleMutationFecesChromosomes, BacterialMolecular Sequence DataDrug Resistance, NeoplasmGenes, BacterialPivampicillinBase SequenceCulture MediaBacteriaDNA Restriction EnzymesRecombination, GeneticDNA, CircularDisease ResistanceGram-Negative BacteriaGram-Positive BacteriaGenesVascular ResistancePolymerase Chain ReactionGentamicinsChloramphenicolStaphylococcus aureusCloning, MolecularNucleic Acid HybridizationEnterococcus faecalisDrug Resistance, ViralBacterial InfectionsDisk Diffusion Antimicrobial TestsCephalosporinsDNA, Recombinantbeta-LactamsSulfamethoxazoleCiprofloxacinTetracycline Resistancebeta-Lactam ResistanceErythromycinCathelicidinsbeta-DefensinsTrimethoprim-Sulfamethoxazole CombinationSalmonellaShigellaPseudomonas aeruginosaDysentery, BacillaryColony Count, MicrobialPenicillanic AcidEnterococcusDefensinsEscherichia coli InfectionsSalmonella InfectionsAmoxicillinNitrofurantoinGram-Negative Bacterial InfectionsStaphylococcusFluoroquinolonesCloxacillinAmino Acid SequenceGenetic Vectors