Friday's announcement from Public Health England (PHE) takes the number of confirmed cases from six to nine and the deaths from three to five.
Last week PHE confirmed two patients from Manchester Royal Infirmary and one at Aintree Hospital had died.
Sandwiches and salads from the Good Food Chain linked to the outbreak have been withdrawn and production stopped.
All but one of the deaths happened more than a month ago, PHE said.
The chain - which supplied 43 NHS trusts across the UK - had been supplied with meat produced by North Country Cooked Meats, which subsequently produced a positive ...
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