BANGKOK, June 11 — E. coli bacteria was found in kohlrabi (commonly known as German turnip) imported from northern Europe, and it will take between three to five days for laboratory tests to determine whether or not the strain is hazardous, a senior public health ministry official announced today.

Dr Sathaporn Wongcharoen, director-general of Medical Sciences Department, said his department had found kohlrabi imported from northern Europe contaminated with E.coli during the laboratory tests, but it was still unknown whether it contained the deadly O104 strain.

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