State health officials say there has been an increase in the number of people reporting illnesses since consuming raw milk from a Franklin County farm.
The Health Department said Monday that they have now confirmed 12 cases of Campylobacter infection in Pennsylvania and Maryland.
Officials are awaiting test results on the raw milk sold by The Family Cow store in Chambersburg, but said all of those sickened bought raw milk from the store.
Raw milk is milk that has not been pasteurized.
A formal recall has not been announced, but officials have recommended that people throw out any raw milk bought from the store after January 1.
The farm has voluntarily suspended raw milk production.