VirginiamycinFood AdditivesStreptogramin Group BPlectonemaStreptogramins4-ButyrolactoneStreptomycesTylosinAnti-Bacterial AgentsHelix-Turn-Helix MotifsBacitracinAnimal FeedLiver AbscessFuransEnterococcus faeciumFluorineDrug Resistance, MicrobialDigestionRibosomesIleumRumenChickensSwineBacteriaBacterial ProteinsFermentationMicrobial Sensitivity Tests