Aldi has removed all eggs from its stores in Germany as they may have been infected by insecticide.
Tests display that the anti kidney, liver and thyroid glands chemical fipronil was found in eggs from the Netherlands.
Fipronil chemical is used to treat lice and ticks in chickens.
A German official said up to 10 million of the affected eggs may have been sold in Germany.
A German official told television that there was a risk to children if they ate two of the eggs a day.
In the Netherlands, about 200 poultry farms have been temporarily closed while investigations are held.
European supermarkets including Aldi have stopped the distribution of eggs from the affected batches.
An Aldi spokeswoman for the UK told the BBC that its eggs were all British and were not affected by the contamination.
The Netherlands exports an estimated 65% of the 10 billion eggs it produces every year.