At least 58 people have been sickened, and two — one in California and one in Canada — have died because they contracted E. coli O157:H7 in November and December, believed to be related to eating romaine lettuce or other leafy greens. In the United States, the U.S. Centers for Disease Control has linked at least 17 reports of illness in 13 states to the outbreak.
That has many people passing on Caesar's salad. But UC Cooperative Extension specialist Trevor Suslow said it is unlikely that romaine now at grocery stores is contaminated, reported Bob Rodriguez in the Fresno Bee.
"It's not going to last that long, it's gone," Suslow said.
The CDC is conducting whole genome sequencing on samples of bacteria making people sick in the U.S. and Canada to determine whether they are related. Preliminary results show the type of E. coli is closely related genetically, the CDC reported.