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The dangers of E. coli
01:24 - Source: CNN

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CNN  — 

Here’s a look at E. coli outbreaks in the United States.

General Information (from the CDC)

There are many strains of the bacteria Escherichia coli (E. coli). Most strains are harmless and live in the intestines of healthy humans and animals.

Some kinds of E. coli cause disease by producing Shiga toxin. The bacteria that make these toxins are called “Shiga toxin-producing” E. coli (STEC). The most commonly found STEC in the United States is E. coli O157:H7.

The symptoms of STEC infections can include stomach cramps, diarrhea and vomiting. Some infections are mild, but others can be life-threatening.

The CDC estimates that 265,000 STEC infections occur each year in the United States. E. coli O157:H7 causes more than 36% of these infections.

People of all ages can be infected, but young children and the elderly are more likely to develop severe symptoms.

The types of E. coli that can cause illness can be transmitted through contaminated water or food, or through contact with people or animals.


To avoid E. coli infections, experts advise to thoroughly cook meat, avoid unpasteurized dairy products and juices, avoid swallowing water while swimming and wash hands regularly.

1998 - The Hazard Analysis and Critical Control Points program (HACCP) begins requiring meat processors to establish critical checkpoints in the plants to prevent pathogens from contaminating meat.
- Inspectors from the food-safety agency randomly test all facilities that grind meat products to make sure that the plants are complying with the HACCP program.

1999 - The US Dept of Agriculture (USDA) approves the irradiation process for meat. Irradiation is a process that uses beams of high-speed electrons to kill E. coli and other bacteria.

May 2000 - Huisken Meats of Sauk Rapids, Minnesota, becomes the first meat processor to begin selling irradiated ground beef to retailers.

June 2009 - Epitopix LLC, a Minnesota-based veterinary pharmaceutical company, begins licensing a new vaccine for cows that reduces the transmission of E. coli between cows and humans.

Timeline of selected E. coli outbreaks in the United States

Jack in the Box (E. coli O157:H7)

1992-1993 - The Jack in the Box outbreak kills three children and makes about 500 people sick in the Northwest United States.

The Jack in the Box incident leads the Bill Clinton administration to begin random testing for E. coli in ground beef.

The meatpacking industry sues the USDA to block the tests. The USDA wins the lawsuit.

ConAgra Beef Co. (E. coli O157:H7)

July 19, 2002 - Nineteen million pounds of meat produced at the ConAgra Beef Co.’s Greeley, Colorado, plant is recalled.

At least 35 people become ill due to this meat contamination and one person dies.

The contaminated meat is shipped to at least 21 states.

Prepackaged Spinach (E. coli O157:H7)

September 14, 2006 - The FDA issues a warning to consumers about an E. coli O157:H7 outbreak in multiple states. The warning states, “preliminary epidemiological evidence suggests that bagged fresh spinach may be a possible cause of this outbreak.”

Fall 2006 - At least 199 cases of E. coli infection occur in 26 states. Three people die and about 31 develop Hemolytic Uremic Syndrome (HUS), a dangerous complication that can lead to kidney failure.

The outbreak is most severe in Wisconsin, where 49 cases are reported to the FDA, and one death is confirmed.

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.

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 (E. coli O157:H7)

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.

December 14, 2006 - The CDC reports that 71 people in five states have fallen ill from the strain of E. coli bacteria involved in the Taco Bell outbreak.

Topp’s Ground Beef Patties (E. coli O157:H7)

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 pounds 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 21 people are hospitalized and two developed hemolytic-uremic syndrome.

Cheese (E. coli O157:H7)

November 5, 2010 - Thirty-eight people from five states are sickened from cheese sold at Costco. Fifteen are hospitalized and one suffers from hemolytic uremic syndrome (HUS), a form of kidney failure.

November 23, 2010 - Bravo Farms recalls all its cheeses.

Chipotle (E. coli O26)

October 31, 2015 - Health officials in Washington and Oregon announce that an outbreak of E. coli infections may be linked to food served at Chipotle restaurants in Washington and Oregon.

November 3, 2015 - Chipotle announces it has closed 43 restaurants in Oregon and Washington.

November 20, 2015 - The CDC reports 45 people in six states have been infected with E. coli. The six states are Washington, Oregon, California, Minnesota, New York and Ohio. The report says evidence suggests that “a common meal item or ingredient served at Chipotle Mexican Grill restaurants…is a likely source of this outbreak.”

December 4, 2015 - The CDC reports that an additional seven people have been infected. Three new states, Illinois, Maryland and Pennsylvania have reported cases. This brings the total to 52 people infected in nine states.

February 1, 2016 - The CDC says the Chipotle outbreaks “appear to be over.” In the initial outbreak, 55 peopl