E. coli O157:H7 outbreaks associated with lettuce, specifically the “pre-washed” and “ready-to-eat” varieties, are by no means a new phenomenon. In fact, the frequency with which this country’s fresh produce consuming public has been hit by outbreaks of pathogenic bacteria is astonishing. Here is just a sample of E. coli outbreaks based on information gathered by the Center for Science in the Public Interest, Kansas State University, and the Centers for Disease Control and Prevention:

Date Vehicle Etiology Confirmed
Cases
States/Provinces
July 1995 Lettuce (leafy green; red; romaine) E. coli O157:H7 74 1:MT
Sept. 1995 Lettuce (romaine) E. coli O157:H7 20 1:ID
Sept. 1995 Lettuce (iceberg) E. coli O157:H7 30 1:ME
Oct. 1995 Lettuce (iceberg; unconfirmed) E. coli O157:H7 11 1:OH
May-June 1996 Lettuce (mesclun; red leaf) E. coli O157:H7 61 3:CT, IL, NY
May 1998 Salad E. coli O157:H7 2 1:CA
Feb.-Mar. 1999 Lettuce (iceberg) E. coli O157:H7 72 1:NE
Oct. 1999 Salad E. coli O157:H7 92 3:OR, PA, OH
Oct. 2000 Lettuce E. coli O157:H7 6 1:IN
Nov. 2001 Lettuce E. coli O157:H7 20 1:TX
July-Aug. 2002 Lettuce (romaine) E. coli O157:H7 29 2:WA, ID
Nov. 2002 Lettuce E. coli O157:H7 13 1:Il
Dec. 2002 Lettuce E. coli O157:H7 3 1:MN
Oct. 2003-May 2004 Lettuce (mixed salad) E. coli O157:H7 57 1:CA
Apr. 2004 Spinach E. coli O157:H7 16 1:CA
Nov. 2004 Lettuce E. coli O157:H7 6 1:NJ
Sept. 2005 Lettuce (romaine) E. coli O157:H7 32 3:MN, WI, OR
Sept. 2006 Spinach (baby) E. coli O157:H7 and other serotypes 205 Multistate and Canada
Nov./Dec. 2006 Lettuce E. coli O157:H7 71 4:NY, NJ, PA, DE
Nov./Dec. 2006 Lettuce E. coli O157:H7 81 3:IA, MN, WI
July 2007 Lettuce E. coli O157:H7 26 1:AL
May 2008 Romaine E. coli O157:H7 9 1:WA
Oct. 2008 Lettuce E. coli O157:H7 59 Multistate and Canada
Nov. 2008 Lettuce E. coli O157:H7 130 Canada
Sept. 2009 Lettuce: Romaine or Iceberg E. coli O157:H7 29 Multistate
Sept. 2009 Lettuce E. coli O157:H7 10 Multistate
April 2010 Romaine E. coli O145 33 5:MI, NY, OH, PA, TN
Oct. 2011 Romaine E. coli O157:H7 60 Multistate
April 2012 Romaine E. coli O157:H7 28

1:CA

Canada

June 2012 Romaine E. coli O157:H7 52 Multistate
Sept. 2012 Romaine E. coli O157:H7 9 1:PA
Oct. 2012 Spinach and Spring Mix Blend E. coli O157:H7 33 Multistate
Apr. 2013 Leafy Greens E. coli O157:H7 14 Multistate
Aug. 2013 Leafy Greens E. coli O157:H7 15 1:PA
Oct. 2013 Ready-To-Eat Salads E. coli O157:H7 33 Multistate
Apr. 2014 Romaine E. coli O126 4 1:MN
Apr. 2015 Leafy Greens E. coli O145 7 3:MD, SC, VA
June 2016 Mesclun Mix E. coli O157:H7 11 3:IL, MI, WI
Nov. 2017 Leafy Greens E. coli O157:H7 67 Multistate and Canada
Mar. 2018 Romaine E. coli O157:H7 219 Multistate and Canada