An employee cleans dialysis machines in an isolation area of the 'Universitaetsklinikum Hamburg-Eppendorf ' (University Clinic Eppendorf- UKE) in the northern German town of Hamburg, June 2, 2011. The University Medical Center has the highest number of patients infected with EHEC as well as 102 patients. A deadly outbreak of E.coli centred in Germany and spreading across Europe is caused by a dangerous new strain, Chinese scientists who analysed the bacteria said. REUTERS/Fabian Bimmer (GERMANY - Tags: SCI TECH HEALTH)