The agency had analysed “historical” egg samples from a Belgian egg-processing plant, explained Herman Diricks, head of the agency.
Of 14 samples kept by the firm from September 2016, one had “residual traces of Fipronil,” he said.
The quantity of the toxic insecticide was lower than 0,005mg/kg, which is considered a residual quantity in European regulations, clarified the head of the federal agency for food security.
No quantity of this insecticide has been found in the egg samples dating from October to December 2016, also kept by the egg-processing plant, which had bought its eggs from numerous other countries.
Fipronil is “slightly toxic” when ingested in large quantities, according to the World Health Organisation (WHO).
A crisis in the making