title: Clostridium difficile: responding to a new threat from an old enemy.
authors.forename: L Clifford
authors.initials: LC
authors.lastname: McDonald
mesh_terms: D016360:Clostridioides difficile / Q000302:isolation & purification / Q000472:pathogenicity*; D003428:Cross Infection / Q000453:epidemiology*; D004196:Disease Outbreaks; D004761:Enterocolitis, Pseudomembranous / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D014481:United States / Q000453:epidemiology