Escherichia coli O157:H7, a Gram-negative bacillus, is a specific serotype of the shiga toxin producing class of
E. coli (STEC) and the most common such serotype in the US. Incubation period is 2-8 days. Shiga toxins cause
abdominal cramps and watery diarrhea, often developing into bloody diarrhea; fever is uncommon. Likely modes of transmission include foodborne (e.g., undercooked ground beef, fresh produce, unpasteurized juice, raw milk) and person-to-person (e.g., day-care settings). There also have been outbreaks associated with exposure to animals
and their environments and recreational water exposure. All E.coli O157:H7 isolates are confirmed by the Los
Angeles County Public Health Laboratory.
Hemolytic uremic syndrome (HUS) is a clinical diagnosis and may or may not be associated with E. coli O157:H7. Children younger than 5 years of age are at highest risk for hemolytic uremic syndrome (HUS), a clinical complication consisting of hemolytic anemia, thrombocytopenia, and kidney failure. Adults may acquire thrombotic thrombocytopenic purpura (TTP) after STEC infection.
- Los Angeles County: Annual Morbidity Report (2001-2012)
- ACDC: A Manual of Departmental Rules, Regulations and Control Procedures (B73)
- LAC/CDPH Report Form: E. Coli 0157:H7, Other STEC, Shiga Toxin Positive Feces, and/or HUS Case Report, CDPH 8555 (revised 04/11)
- LAC: Reported Cases of Selected Diseases (2007-2012)
- LAC: Reported Cases of Selected Diseases (2003 - 2008)
- Transesophageal Echocardiography, Insufficient Cleaning Practices and Lax Equipment Maintenance, and Escherichia Coli - A Breakdown in Infection Control (2006 Special Study)
- An Outbreak of Enterotoxogenic Escherichia Coli Associated With a Catered Event (2004 Special Study)
- ACDC: Food and Water Safety Page