The Dutch food and product safety board has locked down more than 20 egg farms, because they are suspected of using an illegal insecticide called Fipronil to control red mite.
Latest estimates from the government agency are that 200 farms are involved, but in what scope is not yet known. Earlier, after the first alarms went off in Belgium, 4 Dutch farms tested positive for residues in eggs above the maximum residue limit of 0,005 mg/kg. Although there is no immediate danger to public health, farms that produce eggs above the threshold cannot go on the market. Some experts expect that traces of the insecticide can stay in the abdominal fat of the layers for up to 8 month, rendering them worthless.