A recall has been issued for frozen vegetables across three states that may be contaminated with potentially deadly listeria bacteria.

Customers in NSW, Victoria and Tasmania have been urged to discard 1 kilogram packets of Black and Gold mixed vegetables, regardless of their best before date.

What is listeriosis? Listeriosis is a serious and sometimes fatal bacterial infection

Listeriosis is a serious and sometimes fatal bacterial infection Symptoms can include fever, headaches, cramps, aches and pains, nausea and diarrhoea

Symptoms can include fever, headaches, cramps, aches and pains, nausea and diarrhoea It can be fatal in newborns, elderly people and people with a weakened immune system

The NSW Food Authority said anyone concerned about their health should seek medical advice.

"Consumers should not consume this product and should return it to the place of purchase for a full refund," it said.

The product is sold in IGA, Campbells and Independent Grocers.

Listeria can be particularly dangerous for pregnant women and their unborn babies, along with the elderly and anyone with weakened immune systems.

The warning comes weeks after a similar listeria-related recall of popular frozen vegetable products sold in Aldi, Woolworths and IGA stores, some of which were imported from Europe.

The peak body for Australian vegetable growers, AUSVEG, said that recall did not involve any locally grown products.

There have also been major concerns about a listeria outbreak linked to Rockmelon produced at a NSW farm at Nericon, near Griffith.

A listeria outbreak linked to rockmelons claimed six lives earlier this year. ( Matt Brann )

The contamination, which was identified in February, claimed six lives in NSW and Victoria.

It also prompted a huge drop in rockmelon sales, which plummeted by 90 per cent at one point.

Rombola Family Farms in April confirmed it had been given approval to restart production after meeting all requirements of the Food Authority's clearance program.

The NSW Goverment disputed the company's claim there was no specific source for the outbreak associated with Rombola or the farm's rockmelon washing, storing or packing facilities.

Australian Manufacturing Workers' Union national food secretary Jason Hefford previously said July's outbreak highlighted the dangers of imported frozen vegetables.

There have also been other outbreaks associated with frozen berries, including a hepatitis A scare in 2017.

The July listeria outbreak occurred in the same week country of origin labelling became mandatory.

"The reality is that no country in the world has safer or cleaner food standards than Australia — not even Europe," Mr Hefford said.