Three more Australians have been stricken with listeriosis after eating soft cheese, bringing the total number of people affected nationwide to 21.

Two Australians have died and a pregnant woman has miscarried following the outbreak.

The people ate cheese produced by the Jindi Cheese Company that has since been recalled.

Jindi has voluntarily recalled all batches of cheese manufactured up to and including January 6.

NSW Health acting director of health protection Professor Wayne Smith said all of the recent cases involved people aged over 65 with one person in a serious condition.

Consumers can call the Jindi helpline on 1800 680 175 for more information on the recalled cheeses.