San Francisco Marin Medical Society Blog

SFDPH Health Alert: Surveillance for E. coli O157



Eight cases of presumptive Escherichia coli O157 have been reported to the San Francisco Department of Public Health (SFDPH) during the past week. All of the reported cases have presented with bloody diarrhea, and one has progressed to hemolytic-uremic syndrome (HUS).

SFDPH is working with the California Department of Public Health (CDPH) and the California Emerging Infections Program (CEIP) to monitor the spread of disease, confirm the E. coli strain(s) involved, gather information from clinicians and interviews with patients, and determine whether the cases may be linked or share a common source. To date the cases have not been linked to each other or to a common source.

In order to identify any additional cases of E. coli O157 in San Francisco residents, SFDPH is conducting surveillance for illnesses that may be related to the outbreak.

San Francisco Physicians are asked to:

  1. Remain alert for adult or pediatric patients who have HUS or acute onset of bloody diarrhea.
  2. Obtain stool samples for culture from patients with bloody diarrhea and test those specimens for E. coli O157 as well as other suspect pathogens.
  3. Report cases of HUS or Shiga toxin-producing E. coli (STEC) including E. coli O157 immediately (within 1 hour) to SFDPH Communicable Disease Control Unit (415) 554-2830.
  4. Clinical laboratories should send E. coli O157 isolates to SFDPH Laboratory for confirmation and further characterization. Do not send specimens directly to CDPH or CDC. For laboratory-related questions, please call the SFDPH Laboratory at (415) 554-2800.

Click here to view the August 28, 2013 SFDPH Health Alert.


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