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E. Coli Outbreak Grows
CDC Says 24 People Now Infected

January 12, 2018

(NATIONAL) -- The Centers for Disease Control and Prevention (CDC) announced Wednesday that seven more people are now included in an E. Coli sickness outbreak thought to be linked to as yet unspecified salad greens that were contaminated with the E. coli bacteria.

The outbreak was first announced in December.

New cases have been identified says the CDC in California, Pennsylvania, Maryland, New Jersey and Indiana. The CDC also says it performed DNA "whole genome sequencing" on the bacteria that caused the outbreak and discovered the bacteria were genetically similar to those implicated in a similar outbreak in Canada.

The test results mean it is likely, says the agency that there is a source of the outbreak that both countries shared but to date neither Canadian or American health officials have been able to pinpoint with certainty how people became infected.

The CDC statement says: "The likely source of the outbreak in the United States appears to be leafy greens, but officials have not specifically identified a type of leafy greens eaten by people who became ill. Leafy greens typically have a short shelf life, and since the last illness started a month ago, it is likely that contaminated leafy greens linked to this outbreak are no longer available for sale. Canada identified romaine lettuce as the source of illnesses there, but the source of the romaine lettuce or where it became contaminated is unknown."

The investigation into the outbreak found that some people ate prepared salads at restaurants, while others likely became ill from eating "leafy greens" like lettuce at home. Five of those who got sick said they'd eaten romaine lettuce -- the type of lettuce linked to the Canadian outbreak, according to the Public Health Agency of Canada.

However, the CDC said that people who got sick during this outbreak “were not more likely than healthy people to have eaten romaine lettuce.”

Outbreak Summary

In the United States, a total of 24 STEC O157:H7 infections have been reported from California (4), Connecticut (2), Illinois (1), Indiana (2), Maryland (3), Michigan (1), Nebraska (1), New Hampshire (2), New Jersey (1), New York (1), Ohio (1), Pennsylvania (2), Vermont (1), Virginia (1), and Washington (1).

Illnesses started on dates from November 15 through December 12, 2017. Among the 18 ill people for whom CDC has information, nine were hospitalized, including one person in California who died. Two people developed hemolytic uremic syndrome, a type of kidney failure.

The Public Health Agency of Canada identified romaine lettuce as the source of the outbreak in Canada. In the United States, the likely source of the outbreak appears to be leafy greens, but health officials have not identified a specific type of leafy greens that sick people ate in common.

State and local public health officials continue to interview sick people in the United States to determine what they ate in the week before their illness started. Of 13 people interviewed, all 13 reported eating leafy greens. Five (56%) of nine ill people specifically reported eating romaine lettuce.

This percentage was not significantly higher than results from a survey of healthy people in which 46% reported eating romaine lettuce in the week before they were interviewed. Based on this information, U.S. health officials concluded that ill people in this outbreak were not more likely than healthy people to have eaten romaine lettuce.

Ill people also reported eating different types and brands of romaine lettuce. Currently, no common supplier, distributor, or retailer of leafy greens has been identified as a possible source of the outbreak. CDC continues to work with regulatory partners in several states, at the U.S. Food and Drug Administration, and the Canadian Food Inspection Agency to identify the source.

Although the most recent illness started on December 12, there is a delay between when someone gets sick and when the illness is reported to CDC. For STEC O157:H7 infections, this period can be two to three weeks. Holidays can increase this delay. Because of these reporting delays, more time is needed before CDC can say the outbreak in the United Stated is over. This investigation is ongoing.

Advice to Consumers

CDC is not recommending that U.S. residents avoid any particular food given the short shelf life of leafy greens and because a specific type of leafy greens has not been identified.

Symptoms of E. coli Infections

Most people develop diarrhea (often bloody) and stomach cramps. People usually get sick from E. coli O157:H7 three to four days after eating food contaminated with the germ. If you are concerned that you have an E. coli infection, talk to your healthcare provider.



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