Updated: November 3, 2015 5:23 PM ET | Originally published: November 3, 2015 4:37 PM EST

The number of confirmed and presumed E. coli cases across Oregon and Washington state has jumped to 37 from 22 — with the majority linked to Chipotle restaurants, health officials said Tuesday.

The Portland metro area is now at 12 cases, up from three announced Monday, while Washington has seen 25 cases, up from the 19 people who have suffered from food poisoning from the bacterial illness.

The cases in Oregon date to at least Oct. 7, and the number could rise as people show symptoms following an incubation period that could stretch as long as 10 days, health officials said. Chipotle said six…

Read the rest of the story from our partners at NBC News

Read next:

Contact us at letters@time.com.

Read More From TIME

Related Stories

EDIT POST