Customers who bought some chicken salad from Costco stores in Montana are being warned not to eat it, due to a risk of becoming ill.

The Department of Public Health and Human Services (DPHHS), along with the Centers for Disease Control and Prevention and other western states, on Tuesday issued a notice to Costco customers who purchased chicken salad between October 18, 2015 and November 23, 2015, according to a news release from DPHHS

Since late October, six individuals in Yellowstone, Gallatin and Lewis and Clark counties have become ill from E.coli 0157: H7 bacteria. Two of the cases were hospitalized. The six Montana cases are part of a larger outbreak involving multiple states. The exact origin of the outbreak is unknown at this time.Others states with confirmed E. coli cased linked to Costco chicken salad include Colorado, Utah, and Washington.

However, illness investigations have identified Costco chicken salad as a risk factor. Costco has already voluntarily removed the chicken salad (item #37719) from their shelves and no other products are a concern at this time, according to the release. Local health authorities in Montana are contacting Costco stores in their areas to verify the product has been removed from shelves, and are no longer available for purchase.

“If customers have consumed this product, and they have become ill, we encourage them to consult with their healthcare provider,” Dana Fejes of the DPHHS Communicable Disease Epidemiology Section, said in the release. The state is issuing this urgent message to ensure the product is not consumed. “If customers have consumed this product, and they have become ill, we encourage them to consult with their healthcare provider,” she said.

Fejes indicated that Costco has been helpful with our investigation and taken steps to protect the public by removing the product. “Our concern is that chicken salad already purchased may still be in someone’s refrigerator or freezer and that product should not be consumed,” she said.

People who become ill from E. coli 0157:H7 usually get sick within two to eight days after ingesting the bacteria. Symptoms from illness may include diarrhea, bloody diarrhea, and abdominal cramps. Most people recover within a week, but sometimes the illness develops into a more severe form that will likely require hospitalization.

Customers who still have Costco chicken salad in their possession, and the container has a packaging date or sell-by date on the label dated between October 18, 2015 and November 23, 2015, are encouraged to dispose of any remaining product. Additional information can be obtained HERE.