The WA Department of Health has confirmed the state's first case of frozen berry-related hepatitis A.

The first case of hepatitis A believed to be related to contaminated frozen berries has been confirmed in Western Australia.

A Department of Health spokesman said the case was related to the Nannas brand.

This latest case adds to at least 12 other confirmed cases across Australia.

Australians are being urged not to consume Nanna's Raspberries 1kg packs, Nanna's Frozen Mixed Berries 1kg packs, and 300g and 500g packs of Creative Gourmet Mixed Berries.

Communicable Disease Control director Paul Armstrong said there was no need for people who had eaten the products and remained well to see their doctor for testing or vaccination.

Symptoms of hepatitis A can start two to seven weeks after exposure to an infectious person or after eating contaminated food.

Early symptoms are fever, nausea, loss of appetite and abdominal discomfort.

After several days jaundice can develop, with yellowing of the whites of the eyes and skin, dark urine and pale stools, sometimes accompanied by diarrhoea.

Dr Armstrong said anyone who experience symptoms should see their doctor, especially if they had eaten the berries.