The number of people sickened after consuming raw milk from the same dairy has risen to 35 in four states, Pennsylvania health officials said Friday.

The confirmed cases of Campylobacter infection include 28 people in Pennsylvania, four in Maryland, two in West Virginia, and one in New Jersey.

On Thursday, health officials said consumers should discard raw milk bought from the Family Cow farm in Chambersburg, Franklin Co., on or after Jan. 1. The farm has voluntarily suspended its production of raw milk.

A spokeswoman with the Pennsylvania Department of Agriculture said final test results of milk samples from the farm would be available soon.

The federal Food and Drug Administration warns that raw, or unpasteurized, milk can contain harmful bacteria. Dairy farmers said demand is growing because of concerns about hormones in traditional dairy products.