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The laboratory tests food samples from the Cologne-Duesseldorf area with 9.6 million inhabitants. EPA/Roland WeihrauchGERMANY E COLI CRISISepa02770216 A chemist tests food for E coli (EHEC) agents at the Chemical and Veterinary Inspection Office Rhein-Ruhr-Wupper in Krefeld, Germany, 07June 2011. The laboratory tests food samples from the Cologne-Duesseldorf area with 9.6 million inhabitants. EPA/Roland WeihrauchRoland Weihrauchepa02770216 A chemist tests food for E coli (EHEC) agents at the Chemical and Veterinary Inspection Office Rhein-Ruhr-Wupper in Krefeld, Germany, 07June 2011. The laboratory tests food samples from the Cologne-Duesseldorf area with 9.6 million inhabitants. EPA/Roland WeihrauchXMP Roland Weihrauch epa02770216 A chemist tests food for E coli (EHEC) agents at the Chemical and Veterinary Inspection Office Rhein-Ruhr-Wupper in Krefeld, Germany, 07 June 2011. The laboratory tests food samples from the Cologne-Duesseldorf area with 9.6 million inhabitants. EPA/Roland Weihrauch GERMANY E COLI CRISIS Roland WeihrauchFotoWare fotostation1epa02770216 A chemist tests food for E coli (EHEC) agents at the Chemical and Veterinary Inspection Office Rhein-Ruhr-Wupper in Krefeld, Germany, 07 June 2011. The laboratory tests food samples from the Cologne-Duesseldorf area with 9.6 million inhabitants. EPA/Roland Weihrauch FotoWare fotostation