SNOHOMISH, Wash. (AP) - Snoqualmie Gourmet Ice Cream said it is voluntarily recalling nearly a year's worth of ice cream and related products because of possible listeria contamination.

The recall announced Tuesday covers products made from Jan. 1 until Dec. 15. Products include all flavors and sizes of ice cream, gelato, custard and sorbet, as well as Emerald & Spruce Ice Cream and Top Pot Hand Forged Ice Cream.

The Snohomish, Wash., company said listeria was found in samples from its production facility that were analyzed by state Agriculture Department. The company said it is working with the state and the U.S. Food and Drug Administration to determine the cause.

The ice cream, gelato, custard and sorbet were distributed in Arizona, Idaho, California, Oregon and Washington and may have been also distributed in Alaska, Colorado, Montana, Nevada, New Mexico, North Dakota, Texas, Utah and Wyoming.

Listeria can cause serious illness and even death in groups such as children, the frail and the elderly. Healthy people may suffer flu-like symptoms, such as high fever, headache, nausea and diarrhea.