‘The GM Contamination Register database has been run by Genewatch and Greenpeace for about ten years and contains cases dating from 1997 to the end of 2013 . The authors of a new paper, published in the International Journal of Food Contamination, analysed the 400 or so cases in the database by crop and country.
GM rice accounts for about a third of contamination cases, despite the fact there is officially no GM rice grown anywhere in the world. The authors suggest this high level might be related to the routine testing of imports of GM rice at national borders. The highest rates of contamination are in imported foodstuffs to Germany, but this is probably because that country does a lot of testing.
They also focused on cases of contamination arising from unauthorised GM crops: those without any authorisation for commercial growing anywhere in the world. Nine cases were discovered of GM contamination of these unauthorised (non-commercialised) GM crops that haven’t undergone any environmental or food safety analysis.
The authors argue that once GM contamination has happened, it can be difficult to contain.’