Heres what Costco shoppers need to know.

Therecalled salmonwas manufactured by Brooklyn-based Acme Smoked Fish Corp and sold at Costco stores between October 9 and 13.

In addition, serious and sometimes fatal infections in older adults and persons with weakened immune systems can occur.

Customers shop at a Costco Wholesale store

Credit:Joe Raedle/Getty Images

Dr. Celine Gounder toldCBS Morningsthat a more complicated food chain is partly responsible for the recent increase in contamination.

“Every step of food processing, there’s the opportunity for contamination.

That’s number one.

This is a developing story.