AUGUSTA, Maine — A recall of dry dog food linked to a multistate outbreak of Salmonella infantis has been expanded to include products shipped to Maine, according to a statement from the Maine Department of Agriculture.

Although 14 people from nine different states have been infected with the Salmonella from the dog food, the agriculture department said Wednesday no cases have been reported in Maine thus far.

The Mayo Clinic website indicates the best way for people to protect themselves against a Salmonella infection is to wash their hands thoroughly after handling pet food or feces, thus preventing the transfer of the bacteria to their mouths or human food.

“Links to FDA advice are the most significant source of timely updates. The Maine Department of Agriculture has monitored recalls in other states since the initial outbreak in early April. Products sold in Maine were included in the expanded recall issued on May 7, 2012,” said Steve Giguere, acting director of the Division of Quality Assurance & Regulations, in the prepared statement.

Human illnesses related to the pet food should be reported to Dr. Stephen Sears at the Maine Center for Disease Control at 1-800-821-5821, and pet illnesses should be reported to the Maine Department of Agriculture or call 781-596-7700.

The contamination was discovered in April when the Michigan Department of Agriculture and Rural Development was doing routine sampling of Diamond Naturals Lamb and Rice Formula for Adult Dogs. Diamond Pet Foods agreed voluntarily to recall the product.

The pet foods affected include Chicken Soup for the Pet Lover’s Soul, Country Value, Diamond, Diamond Naturals, Premium Edge, Professional, 4Health, Taste of the Wild, Apex (distributed only in South Carolina), Kirkland Signature, Kirkland Signature Nature’s Domain and Canidae.

Other companies that voluntarily recalled products that were produced at the same Gaston, S.C., facility were:

Wellpet LLC’s Wellness Complete Health Super5Mix Large Breed Puppy with “best by” dates of Jan. 9-11, 2013, including 15- and 30-pound bags and 5-ounce sample bags.

Dick Van Patten’s Natural Balance Pet Foods, including Natural Balance Sweet Potato & Venison Dog, Natural Balance Lamb Meal & Brown Rice Dog, Natural Balance Sweet Potato & Bison Dog, Natural Balance Vegetarian Dog, Natural Balance Lamb Meal & Brown Rice Dog Large Breed Bites, Natural Balance Lamb Meal & Brown Rice Dog Small Breed Bites.

Diamond Pet Foods continues to work directly with distributors and retailers where the recalled products are carried to remove them as quickly as possible from the marketplace, and the FDA will will continue to provide updates, according to the press statement.