E. coli outbreak traced to California farm; some romaine lettuce safe to eat

The strain of E. coli causing the current outbreak in romaine lettuce has been found in a reservoir on a far...

Posted: Dec 14, 2018 8:51 PM
Updated: Dec 14, 2018 8:51 PM

The strain of E. coli causing the current outbreak in romaine lettuce has been found in a reservoir on a farm in Santa Barbara County, California, the US Food and Drug Administration and the Centers for Disease Control and Prevention announced Thursday.

The agencies are continuing to investigate other possible sources, and the CDC still advises consumers not to eat romaine lettuce grown in California's Monterey, San Benito and Santa Barbara counties until investigations are complete.

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"We cannot say how many cases are linked to this specific farm at this time," said Ian Williams, chief of the CDC's outbreak response and prevention branch. "We have to do additional work at this farm and other farms that are being identified from our investigation."

Properly labeled romaine grown outside those three counties and harvested after November 23, as well as romaine grown in greenhouses or hydroponically, should all be safe from contamination, the CDC said. The earlier warning against eating romaine from California's San Luis Obispo, Santa Cruz and Ventura counties has been lifted.

The agency stressed that consumers should continue to avoid any romaine lettuce not labeled with the harvest date and location.

The CDC has identified another seven illnesses since its update December 6, bringing the total people infected with E. coli to 59 across 15 states and the District of Columbia. The last reported illness was November 16. There have been 23 hospitalizations and two cases of hemolytic uremic syndrome, a type of kidney failure. No deaths have been reported.

While calling it "premature" to call the outbreak over, Williams said it was a good sign that the most recently identified cases were in the same time period as the main outbreak.

"We're hopeful that it's moving in the right direction," he said. "It's still too early to tell."

The first cases in this outbreak were identified in October. Cases have been reported in California, Connecticut, Florida, Illinois, Louisiana, Massachusetts, Maryland, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island and Wisconsin.

More potential sources

Water and sediment at the irrigation reservoir on the property of Adam Bros. Family Farms in Santa Maria tested positive for E. coli O157:H7 that was a nearly identical genetic match to the strain found in people who have fallen ill, Williams said.

But the contaminated water at that farm does not fully explain all of the illnesses, nor do the agencies know how the reservoir became contaminated with the bacteria.

"We don't believe this is the only location involved in the outbreak," said Dr. Stephen Ostroff, senior adviser to FDA Commissioner Dr. Scott Gottlieb. The investigation has identified 11 distributors, nine growers and eight farms as potential sources.

In the meantime, Adam Bros. is recalling all produce that may be contaminated. "They have committed to recalling products that may have come into contact with water from the water reservoir where the outbreak strain was found," the FDA said Thursday.

On Friday, the company said in a statement that it is recalling red leaf lettuce, green leaf lettuce and cauliflower harvested from November 27 through November 30 "out of an abundance of caution."

Many of the affected individuals ate more than one meal of romaine across a number of restaurants, the CDC said, further complicating the trace-back investigation.

E. coli infection symptoms

E. coli are a diverse family of bacteria that can be found in the environment, in foods and in the intestines of people and animals. Most strains are harmless.

To avoid becoming infected with a harmful strain, the CDC recommends using proper hygiene; cooking meat at proper temperatures; avoiding raw milk and unpasteurized dairy products and juices; and not swallowing water when swimming.

Symptoms of an E. coli infection, which usually begin about three or four days after consuming the bacteria, can include watery or bloody diarrhea, fever, abdominal cramps, nausea and vomiting, according to the CDC.

Most people infected by the bacteria get better within five to seven days, though the particular strain of E. coli in the California outbreak tends to cause more severe illness.

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