BBC News reports a third child in central Scotland has been admitted to hospital with suspected botulism.
NHS Forth Valley said the child was a sibling of the other two being treated for the illness, which has been linked to Loyd Grossman branded korma sauce.
The child is being treated at the Royal Hospital for Sick Children in Glasgow and is said to be stable.
At present, health officials believe only one jar of the sauce was contaminated.
The two siblings who were admitted to hospital last week are "stable and improving", NHS Forth Valley said in a statement.
TV presenter Loyd Grossman was said to be "devastated" after the botulism poisoning cases came to light. The sauce was made by Premier Foods at its factory in Bury St Edmunds, Suffolk.
The Food Standards Agency has warned people not to consume jars of Loyd Grossman korma sauce in 350g jars with a best-before date of February 2013. The batch code is: 1218R.
Investigations carried out to date at the factory and on other jars from this and other batches, have not revealed any contamination.