Yesterday, the Irish food safety authority revealed that it has discovered traces of horsemeat and pig DNA in supposedly all-beef burgers sold in some UK supermarkets, including giant Tesco. According to the BBC, "a total of 27 products were analysed, with 10 of them containing horse DNA and 23 containing pig DNA" — and 21 of 31 tested beef meal products tested positive for pig DNA, too. The meat in question comes from two Irish processing plants and, in one Tesco burger sample, "[h]orsemeat accounted for approximately 29% of the meat content."
Obviously, people are not too happy about all this in the UK and Tesco's shares fell, resulting in a £300m market value loss. In response, the grocer has withdrawn the products in question and offered an apology for any distress that might have been caused. Here's Tesco technical director Tim Smith discussing further investigation into how the horsemeat got into the burgers and explaining there were only two ways for this to happen, "one of them involves illegality by suppliers or suppliers to those individual suppliers or gross negligence."
Video: Tesco boss responds to discovery of horsemeat in burgers
· Horsemeat found in beefburgers on sale in UK and Ireland [BBC News]
· Tesco boss responds to discovery of horsemeat in burgers [The Guardian]