Employee displays stool sample with EHEC bacteria strain in microbiological laboratory of UKE clinic...
An employee displays a stool sample with EHEC bacteria (bacterium Escherichia coli.) strain in the microbiological laboratory of the 'Universitaetsklinikum Hamburg-Eppendorf ' (University Cllinic Eppendorf- UKE) in the northern German town of Hamburg May 24, 2011. REUTERS/Morris Mac Matzen (GERMANY - Tags: SCI TECH HEALTH)