Eggs, coming mainly from the Netherlands, were found to contain fipronil, a substance used to kill lice and ticks on animals that is banned by the European Union for use in the food industry.
It is thought it was added to disinfectant in some chicken farms.
It can cause damage to the liver, thyroid glands and kidneys, if consumed in large quantities, though this has only been tested on rats.
One tonne of egg yolk liquid contaminated with the insecticide fipronil has been found in Romania, the first discovery in eastern Europe since the tainted egg scandal erupted, the veterinary health authority said Thursday, medicalxpress.com informs.
Photo taken on August 9, 2017 shows eggs sold in a Belgian market, in Brussels, Belgium.
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The recall of 13 SKUs in the United Kingdom was revealed when the country's Food Standards Agency issued an update on the number of eggs that arrived in the United Kingdom from Dutch farms affected by the contamination.
"Blaming and shaming will bring us nowhere and I want to stop this", EU Health Commissioner Vytenis Andriukaitis from Lithuania said.
Two arrests have been made after Dutch and Belgium authorities conducted joint raids.
Dutch police spokeswoman Marieke van der Molen said: "It relates to two managers at the company that allegedly used the substance (fipronil) at poultry farms".
Luxembourg said eggs sold in branches of the discount supermarket Aldi had been withdrawn, with one batch containing so much fipronil it was unsafe to be eaten by young children.
The contaminated Dutch egg scandal should force United Kingdom retailers to look again at their egg sourcing policies and buy British, the United Kingdom egg industry has said.
Authorities suspect Belgian company Poultry Vision of producing a fipronil-laced treatment created to kill mites in chickens.
With the contaminated eggs starting to surface in countries across Europe, Dutch and Belgian officials are facing growing questions about how the scandal started and whether the public has been kept fully aware. However, a Belgian supplier that is believed to have colluded with the Dutch company, is also under investigation.