Although none tested positive for horse DNA, some own-brand meatballs were found to contain traces of pork.

BBC: Iceland boss blames councils over 'poor meat quality'

The evidence had come from scientists analysing strands of the child's hair that were found to contain traces of the drug.

BBC: Wetherby to Waco - DNA lab's demise

The FSAI tested 27 beef burgers and of that sample, 37% tested positive for traces of horse DNA, while 85% were found to contain traces of pig DNA. The amounts detected were very small, except for one beef burger from Tesco, that was found to contain 29% horsemeat.

BBC: Burgers

The list of questionable Chinese products is growing, as the Food and Drug Administration put a hold on five types of farmed fish and seafood that contain traces of antibiotics that are potentially harmful to humans.

NPR: Chinese Seafood on List of Questionable Products