An investigation into a deadly outbreak of E coli has been thrown into chaos after laboratory tests showed that bean sprouts grown near Hamburg, which had been identified as the likely source, are possibly not to blame.
German officials had said they were confident that sprouts from the organic Gärtenhof farm in Lower Saxony were behind the spread of a particularly virulent strain of the bacterium. There were "strong and clear indications" that the farm was involved, the federal health minister, Daniel Bahr, said.
However, Lower Saxony's agriculture ministry said 23 of 40 samples from the farm had now tested negative for the E coli, with 17 more tests still being done.
"The search for the outbreak's cause is very difficult as several weeks have passed since its suspected start," the ministry said in a statement, while warning that the negative tests did not conclusively prove the sprouts had not been contaminated. The ministry said it may be some time before Europe's shoppers know for sure what foodstuffs are safe: "A conclusion of the investigations and a clarification of the contamination's origin is not expected in the short term."
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http://www.guardian.co.uk/world/2011/jun/06/e-coli-bean-sprouts-not-causeI hope they figure this out soon!!