Employee displays EHEC bacteria strain in petri dish in microbiological laboratory of UKE clinic in northern...
An employee displays EHEC bacteria (bacterium Escherichia coli.) strain in a petri dish containing agar jelly for bacterial culture 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)