The source of the outbreak is traced to fresh, bagged spinach from the California-based Natural Selection Foods company, which issues a voluntary recall of its spinach products.
The states and number of people affected are: Arizona (7), California (2), Colorado (1), Connecticut (3), Idaho (4), Illinois (1), Indiana (9), Kentucky (8), Maine (3), Maryland (3), Michigan (4), Minnesota (2), Nebraska (9), Nevada (1), New Mexico (5), New York (11), Ohio (25), Oregon (6), Pennsylvania (9), Tennessee (1), Utah (17), Virginia (2), Washington (3), West Virginia (1), Wisconsin (49), Wyoming (1)
October 2006 - The FDA matches the E. coli strain to one found on a cattle ranch located next to the spinach fields in Salinas Valley.
Taco Bell/Taco John's - First occurs November 29, 2006 November 29, 2006 - An outbreak begins in New Jersey and New York at nine different Taco Bell locations.
December 5, 2006 - Taco Bell announces the removal of green onions from Taco Bell restaurants nationwide in response to preliminary tests suggesting they are the cause of the E. coli outbreak.
November-December 2006 - As many as 67 people in five states are confirmed as having the strain of E. coli bacteria involved in the Taco Bell outbreak.
December 2006 - Kevin Teale of the Iowa Department of Health tells CNN that approximately 40 people have reported symptoms consistent with E. coli and 11 to 15 people have been hospitalized in Iowa.
December 13, 2006 - Green onions are ruled out as the cause of the E. coli outbreak.
Topp's Ground Beef Patties - First occurs in July 2007 September 25, 2007 - Topps Meat Company issues a recall of its frozen burgers after six people fall ill and three are hospitalized due to E.coli from Topps burgers.
September 29, 2007 - Topps Meat expands its recall to 21.7 million lbs of ground beef products. The company announces a week later that it is going out of business.
October 26, 2007 - An update is released - 40 cases of E. coli identified. At least twenty-one people are hospitalized and two developed hemolytic-uremic syndrome (HUS).
Nestle Toll house Cookie Dough June 19, 2009 - Nestle USA announces a voluntary recall of all its Toll House refrigerated cookie dough after reports of 66 illnesses in 28 states.
September 2, 2009 - Estimates of those affected are increased by health officials to 80 reports of illnesses in 31 states.
JBS Swift Beef Co. April 2, 2009 - The first case of E. coli is reported to the CDC.
June 13, 2009 - The 23rd and last case of E. coli is reported to the CDC. Of those who contracted E. coli, 12 are hospitalized and two suffer some form of kidney failure.
June 24, 2009 - 41,000 pounds of beef are recalled.
June 28, 2009 - 380,000 pounds of beef are recalled.
AFA Foods October 31, 2009 - AFA Foods recalls more than 500,000 pounds of ground beef after an outbreak of E. coli is linked to the deaths of two people.
National Steak and Poultry December 24, 2009 - The Food Safety and Inspection Service issues a recall for 248,000 pounds of National Steak and Poultry beef.
January 4, 2010 - 21 persons from 16 states report being infected with the outbreak strain of E. coli. Nine are hospitalized and one suffers from kidney failure.
Cheese November 5, 2010 - 38 people from five states are sickened from cheese sold at Costco. 15 are hospitalized and one suffers from hemolytic uremic syndrome (HUS), a form of kidney failure.
November 23, 2010 - Bravo Farms recalls all of its cheeses.