A laboratory worker looks for strains of E.coli bacteria in vegetable cells placed in a petri dish, in La Mojonera near Almeria in southeastern Spain June 2, 2011. A deadly outbreak of E.coli centred in Germany and spreading across Europe is caused by a dangerous new strain, Chinese scientists who analyzed the bacteria said. The scientists said the outbreak, which has killed 17 and made more than 1,500 others ill in at least 10 European countries and is thought to come from vegetables, carried genes making it resistant to several classes of antibiotics. REUTERS/Francisco Bonilla (SPAIN - Tags: HEALTH BUSINESS AGRICULTURE SCI TECH)