Investigation tracked bacteria to farm even though tests were negative for deadly strain
German vegetable sprouts caused the
E. coli outbreak that has killed 31 people and sickened more than 3,000, investigators announced Friday after tracking the bacteria from patients in hospital beds to restaurants and then farm fields.
Reinhard Burger, president of the Robert Koch Institute, Germany's national disease control center, said the pattern of the outbreak had produced enough evidence to draw that conclusion even though no tests of sprouts from an organic farm in Lower Saxony had come back positive for the
E. coli strain behind the outbreak.
"In this way, it was possible to narrow down epidemiologically the cause of the outbreak of the illness to the consumption of sprouts," Burger said at a press conference with the heads of Germany's Federal Institute for Risk Assessment and Federal Office for Consumer Protection. "It is the sprouts."
The breakthrough came after a task force from the three institutes linked separate clusters of patients who had fallen sick to 26 restaurants and cafeterias that had received produce from the organic farm.