A health official said another elderly person had died Wednesday but the official said she did not know the age or gender. Eight children were being treated at Children's Hospital of Western Ontario, in London, Ontario, said Julie Troyano, a hospital spokeswoman.
Some strains cause dangerous, even life-threatening, infections.
Symptoms include fever, severe cramping, diarrhea and vomiting. It can take two to 10 days for symptoms to appear and normally about a week to recover. Doctors were unsure what had caused the E. coli outbreak. However, it is believed the bacteria might have found its way into the town's water supply after heavy rains two weeks ago. Five investigators from the Ontario Ministry of Environment were investigating the cause of the outbreak.