victims say they had eaten at a chipotle in the portland area and in western washington over the past few weeks. and experienced severe abdominal cramps and vomiting. >> kind of overwhelming like having all those problems hit at once. >> reporter: out of an abundance of caution chipotle has voluntarily shut down all 43 locations in those two states. out of 1700 restaurants nationwide. saying in a statement the safety and well-being of our customers is always our highest priority. even though the vast majority of these restaurants have no reported problems. >> people can still become ill even if the risk is no longer present because the incubation period can be up to 10 days. >> reporter: and health officials on scene are now trying to pinpoint the exact source of this e. coli outbreak. >> when i did this it was almost always ground beef. there have been outbreaks from from all kinds of fresh produce from lettuce and some outbreaks from salsa and salsa can be really tough. >> reporter:...