Editor’s note: These articles summarize key points from three Centers for Disease Control and Prevention (CDC) reports published in Morbidity and Mortality Weekly Report (MMWR). The comment sections might include additional information that did not appear in the original publications. To subscribe to MMWR, visit www.cdc.gov/MMWR.

♦ “Outbreak of Escherichia coli O104:H4 Infections Associated with Sprout Consumption – Europe and North America, May-July 2011.” MMWR. 2013;62(50):1029-1031, www.cdc.gov/mmwr/preview/mmwrhtml/mm6250a3.htm?s_cid=mm6250a3_w.

Illnesses involving non-O157 serogroups of Shiga toxin-producing Escherichia coli (STEC) are becoming increasingly recognized. An outbreak of STEC O104:H4 associated with consumption of raw sprouts occurred in Europe and North America during May-June 2011. In addition to producing Shiga toxin, the strain had virulence characteristics of an enteroaggregative E. coli pathotype, which increased the strain’s pathogenicity.

U.S. surveillance identified six adult cases associated with the outbreak; four were complicated by hemolytic uremic syndrome. These are the first documented cases of...

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