Bad eggs likely cause of Vic outbreak

A bad batch of eggs is being blamed for a food poisoning outbreak at a Melbourne cafe that affected 25 customers.

The salmonella outbreak occurred at the Food Republic cafe in Blackburn on March 18 after the Department of Health and Human Services linked a number of sick people to the cafe.

DHHS spokesman Bram Alexander said the department could not confirm eggs were the culprit as swabs and food samples have since shown no traces of salmonella in the cafe.

"We are not ruling any food in or any food out" Mr Alexander told AAP.

Food Republic co-owner Vanessa Lekkas says she believes the cause of the food poisoning outbreak was from a "bad batch" of eggs they whipped into raw products such as mayonnaise.

"We no longer have any raw egg products being used," Ms Lekkas told AAP on Wednesday.

"We've all been shattered by people suffering. It's been heart-wrenching".

Ms Lekkas said every surface in the recently refurbished cafe had since been washed, wiped and sanitised to "within an inch of its life".