title: E. coli--sporadic case or an outbreak?
authors.affiliation: York Region Health Services, Newmarket, Ont.
authors.forename: Erica
authors.initials: E
authors.lastname: Weir
authors.forename: Karen
authors.initials: K
authors.lastname: Hay
mesh_terms: D018563:Disease Notification; D004196:Disease Outbreaks; D004927:Escherichia coli Infections / Q000453:epidemiology* / Q000517:prevention & control / Q000628:therapy; D019453:Escherichia coli O157 / Q000472:pathogenicity*; D006801:Humans; D009864:Ontario / Q000453:epidemiology; D015995:Prevalence; D014774:Virulence