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Germany might have wrongly blamed one of its own farms, as well. Over the weekend, officials were quick to point the finger at Gaertnerhof Bienenbuettel farm in northern Germany because it was linked to infections in five German states, but testing on Monday was not conclusive. If the outbreak did start there, it’s long gone and there is no way to prove it, officials said.

But here in the U.S., farmers say this strain of E. coli has not affected business, and they don’t expect it to, because the country does not import many vegetables from Europe.

“We do everything we can to keep the food safe,” said Layne Garett, who works at Clagett Farm in Upper Marlboro.

*This article was based in part on wire service reports.