In late July, the FDA found that an unused package of romaine lettuce and carrot mix distributed to McDonald’s by a Fresh Express processor in Streamwood, Ill., tested positive for the presence of Cyclospora.
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Romaine lettuce from the same lot was distributed in pre-made salads and wraps distributed by Caito Foods LLC, Indianapolis, Ind., though none were packaged for retail.
An investigation by the FDA is ongoing and it’s now reviewing distribution and supplier information for romaine and carrots.
“We’re still not clear what caused that, the lettuce or carrots or some other source, but the bottom line is for the first time, we have a product produced solely inside the United States that is involved with Cyclospora,” says Michael T. Osterholm, PhD, MPH, a McKnight Presidential Endowed Chair in Public Health and the director of the Center for Infectious Disease Research and Policy.
To get answers, Fresh Express named Dr. Osterholm to head a new panel, which will be comprised of about eight experts in the field.
Despite strong food safety standards and practices, unexplained Cyclospora outbreaks continue to occur in the fresh produce industry. These outbreaks have perplexed food safety experts and federal and state public health officials, as to how and why they originated.
“What Fresh Express has done, as they have in the past when issues hit the industry of some major public health importance, they’ve invested in finding answers,” Dr. Osterholm says.
For example, back in 2006 when E. coli became a real challenge with leafy vegetables, with nearly 200 laboratory-confirmed illnesses, 100 hospitalizations, and five deaths, even though Fresh Express’ products weren’t involved, the company put together a panel, which Dr. Osterholm also chaired.
“That helped define what the major challenges were, in terms of research questions and practices that needed to be adopted to address the problem,” says Dr. Osterholm, a world-renowned epidemiologist. “This new panel will take a similar path.”
The list of panel experts will be finalized before summer’s end, and will consist of a full breadth of those with knowledge on the subject, collaborating with officials from both the government and public health.
“We’re bringing together the brain trust of Cyclospora and looking at what we know and don’t know,” Dr. Osterholm says. “There are a lot of unanswered questions.”
In 1997, Dr. Osterholm wrote an editorial in the New England Journal of Medicine after the first Guatemalan raspberry outbreak was reported in 1996 in the U.S. In that he wrote, “there are many questions left unanswered and if we don’t answer them, we’re likely to see these seasonal outbreaks occur.”
“We unfortunately have had a spring/summer outbreak with a variety of produce items ever since 1996 and it just continues,” he says today. “We really need to continue to bring to bear a much greater understanding of the history of Cyclospora in the environment and how it might contaminate something like a leafy green. We’ve seen a number of outbreaks associated with cilantro and carrots. We’ve had outbreaks with berries. It’s very striking how it occurs almost routinely from mid-May through early July each year.”