Some batches of raw milk from the Old Silvana Creamery in Arlington are being recalled out of concern they may be contaminated with Campylobacter.

The recall affects raw milk from the farm with expiration dates of Jan. 23 and Jan. 24, according to Jim Sinnema, who manages the farm.

The milk is sold in 15 stores in Western Washington. The creamery produces several hundred gallons of raw milk a week, he said.

The recall, announced Monday evening, was launched after an independent lab discovered Campylobacter in a routine weekly sample sent to a laboratory for testing, Sinnema said. It had an expiration date of Jan. 23. As a precaution, raw milk from Old Silvana Creamery with an expiration date of Jan. 24 also was recalled, Sinnema said.