Cadbury confectionery products are to face more tests after it emerged that the salmonella scare may have affected more brands than was originally thought.
Seven products have currently been recalled after a leaking pipe at one of its plants was blamed for contaminating the production line with a strain of salmonella.
However, it is now believed that the mix used could have been used as a base ingredient in other products in the Cadbury range.
"We cannot rule out that other products may be affected," said a spokeswoman from the Food Standards Agency.
The chocolate maker has recalled the 250 gram Cadbury Dairy Milk Turkish, Caramel and Mint, Dairy Milk 8 chunk, 1 kilogram Dairy Milk, Dairy Milk Button Easter Egg and the Cadbury Freddo 10p.
"We have taken this precautionary step because our consumers are our highest priority," said UK managing director Simon Baldry. "We apologise for any inconvenience caused."
The outbreak has been blamed on a leaky pipe at the Marlbrook plant, Herefordshire, which produces around 97,000 tonnes of milk chocolate crumb every year. It is then blended with cocoa butter to make milk chocolate, which is used as a base in a number of products.
Cadbury says it has tested tens of thousands of products but no traces of salmonella have been found. It says the recall is being carried out "as a precautionary measure".