Tennessee State Government
Case definition: Enterohemorrhagic Escherichia coli (E. coli) (O157:H7 or shiga toxinpositive)
CDC/MMWR, May2, 1997/Vol. 46/No. RR-10, “Case Definitions for Public Health Surveillance”.
Clinical description
An infection of variable severity characterized by diarrhea (often bloody) and abdominal cramps. Illness may be complicated by hemolytic uremic syndrome (HUS) or thromotic thrombocytopenic purpura (TTP); asymptomatic infections may occur
Laboratory criteria for diagnosis
Isolation of Escherichia coli O157:H7 from a specimen, or Isolation of Shiga toxin-producing E. coli from a clinical specimen
Case classification
Probable: a clinically compatible case that is epidemiologically linked to a confirmed or probable case, or identification of Shiga toxin in a specimen from a clinically compatible case, or definitive evidence of an elevated antibody titer to a known EHEC serotype from a clinically compatible case.
Confirmed: a case that is laboratory confirmed
Suspect: A case of postdiarrheal HUS or TTP
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Patient Information
Name__________________________________________________________ Date of Birth___/___/___ Sex________
Parent’s Name (if child ................
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