TetracyclineTetracyclinesTetracycline ResistanceInfant, PrematureInfant, NewbornInfant, Premature, DiseasesInfant CareInfant FoodOxytetracyclineAnti-Bacterial AgentsInfant FormulaMinocyclineDoxycyclineInfant BehaviorInfant MortalityR FactorsSudden Infant DeathInfant, Newborn, DiseasesMicrobial Sensitivity TestsDrug Resistance, MicrobialInfant Nutritional Physiological PhenomenaChlortetracyclineDemeclocyclineInfant, Very Low Birth WeightInfant, Low Birth WeightErythromycinConjugation, GeneticEscherichia coliBreast FeedingInfant WelfareChloramphenicolDrug Resistance, BacterialDNA, BacterialInfant, Extremely Low Birth WeightDNA Transposable ElementsPregnancyDrug Resistance, Multiple, BacterialMilk, HumanPlasmidsChild DevelopmentGestational AgeSpectinomycinTime FactorsBacterial ProteinsStreptomycinAntiportersMethacyclineInfant, Extremely PrematureInfant, Small for Gestational AgeGenes, BacterialBottle FeedingFecesAmpicillinNeisseria gonorrhoeaePenicillin ResistanceBirth WeightBacteroidesAdministration, OralIntensive Care Units, NeonatalMetronidazoleCryingFurazolidoneRolitetracyclinePenicillinsClindamycinDrug Administration ScheduleMothersMolecular Sequence DataTreatment OutcomeAcne VulgarisProspective StudiesTrimethoprimRadiation DosageInfant Nutrition DisordersExtrachromosomal InheritanceLethal Dose 50Respiratory Distress Syndrome, NewbornDouble-Blind MethodChloramphenicol ResistanceBronchopulmonary DysplasiaUreaplasmaLincomycinKanamycinInfectious Disease Transmission, VerticalStaphylococcusEnterococcus faecalisGonorrheaAnti-Infective AgentsIntensive Care, NeonatalBismuthDrug ResiduesStaphylococcus aureusCholeraDevelopmental DisabilitiesBase SequenceElectrophoresis, Gel, Pulsed-FieldChromosomes, BacterialMicroscopy, UltravioletStreptococcusPolymerase Chain Reaction