title: VTEC O157 outbreak associated with a farm visitor centre in North Wales.
mesh_terms: D000382:Agricultural Workers' Diseases / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D004927:Escherichia coli Infections / Q000453:epidemiology*; D019453:Escherichia coli O157 / Q000302:isolation & purification*; D006801:Humans; D007223:Infant; D014852:Wales / Q000453:epidemiology