title: Introduction.
authors: Carney Hospital, Boston, MA, USA.
authors: Michael
authors: M
authors: Barza
authors: Sherwood
authors: S
authors: Gorbach
authors: Stephen J
authors: SJ
authors: DeVincent
mesh_terms: D000383:Agriculture; D000818:Animals; D000900:Anti-Bacterial Agents; D004351:Drug Resistance; D004363:Drug Utilization; D017753:Ecosystem; D006801:Humans
chemical_list: D000900:Anti-Bacterial Agents