TetracyclineTetracyclinesTetracycline ResistanceAbsorptionIntestinal AbsorptionOxytetracyclineAnti-Bacterial AgentsMinocyclineDoxycyclineR FactorsDrug Resistance, MicrobialMicrobial Sensitivity TestsChlortetracyclineDemeclocyclineBiological AvailabilitySkin AbsorptionErythromycinEscherichia coliConjugation, GeneticChloramphenicolDrug Resistance, BacterialSpectrophotometry, AtomicX-Ray Absorption SpectroscopyFecesJejunumDNA, BacterialDNA Transposable ElementsPlasmidsDrug Resistance, Multiple, BacterialBacterial ProteinsAntiportersSpectinomycinIronAdministration, OralSpectrophotometryMethacyclineStreptomycinGenes, BacterialSpectrum AnalysisIntestine, SmallNeisseria gonorrhoeaeAmpicillinBacteroidesPenicillin ResistanceIntestinesZinc RadioisotopesSpectrophotometry, UltravioletMolecular Sequence DataZincPhytic AcidMetronidazoleFurazolidoneRolitetracyclineKineticsIron RadioisotopesPenicillinsZinc IsotopesBiological TransportClindamycinDuodenumTime FactorsHydrogen-Ion ConcentrationAcne VulgarisIleumTrimethoprimExtrachromosomal InheritanceCaco-2 CellsChloramphenicol ResistanceMalabsorption SyndromesSwineSitosterolsStaphylococcusEnterococcus faecalisLincomycinFerrous CompoundsKanamycinUreaplasmaGonorrheaMicroscopy, UltravioletBiological Transport, ActiveBismuthWaterIntestinal MucosaLymphBase SequenceStreptococcusCattleAnti-Infective AgentsChromosomes, BacterialIron, DietaryDrug ResiduesDietStaphylococcus aureusMutationElectrophoresis, Gel, Pulsed-FieldSpectrophotometry, InfraredMacrolidesCalcium, DietaryEnterocytesBacteria