About 30 people across the country have fallen ill with salmonella poisoning after eating what are believed to be contaminated raw almonds.

Woolworths has announced a national recall of its own brand of almonds.

Read Woolworths's statement about the recall

The WA Health Department says three Western Australians are among the 30 people affected.

It says symptoms of salmonella poisoning include diarrhoea, fever and abdominal cramps.

It is urging anyone with symptoms to seek medical help.