Dozens of poultry farms in Belgium and the Netherlands have been investigated amid the hunt for eggs containing Fipronil, which is dangerous to human health, and several other EU countries are now on the lookout for tainted eggs.
Millions of eggs have been pulled from stores in Belgium, the Netherlands and Germany. Britain, France, Sweden and Switzerland have been warned that contaminated eggs might be on their territories.
She said EU states "have a legal obligation" to notify the Commission immediately if they have information about a threat to human health.
Andreeva declined to say more given that a legal probe is underway in Belgium and the Netherlands to establish who knew what and when.
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Belgian food safety authorities say that of 86 farms checked, 21 were found to have traces of Fipronil, which is banned in products for animals like chickens that are part of the human food chain. The levels detected are seven times below the European limit for what is considered dangerous.
Belgian Agriculture Minister Denis Ducarme has vowed to shed light on the contamination, but says that consumers are not at risk.
"There is no danger today to public health," Ducarme told state broadcaster RTBF Monday. "It's important that consumers understand this, all the eggs that could have been contaminated have been blocked" from reaching shop shelves.
He underlined that the only Fipronil levels found are "well below the European limit." No egg shortages have been signaled at Belgian supermarkets.