Authorities in the United Kingdom and Ireland are investigating a foodborne outbreak suspected to be caused by norovirus in live oysters.
The oysters are thought to have come from Ireland and been purified in the UK and it is believed they are no longer on the market.
Harvesting records and purification operations at the unnamed implicated business in Ireland have been checked with nothing proving that oysters harvested at the time were contaminated.
A number of people fell ill in England and the investigation has pointed towards a potential norovirus outbreak linked to one restaurant.
The Food Safety Authority of Ireland (FSAI) told Food Safety News that it has sought detailed clarification on traceability and delivery channels.