A study, led by the French Professor Gilles-Eric Seralini from the University of Caen, examined the possible effect of the use of Genetically Modified (GM) feed on animal health by testing 70 cows. It is about the longest study ever made concerning this controversial issue. According to the Professor GM maize produces a new modified insecticide like all Bt plants do. Bt stands for Bacillus thuringiensis of which mutated insecticidal toxin gene is inserted in the modified maize. It is mentioned that GM Bt maize is cultivated in Spain and a thorough study shows that it is most probably toxic to cows over the long term and could cause problems related to kidneys and mammary gland break.
«In order to come to a conclusion we should know exactly the long term animal treatment» stated Professor Seralini. The Professor also mentioned the results of research conducted in a German farm during 1997-2002. Based on the results of this period the proportion of healthy cows in the herd decreased to only 40% coinciding with the progressive increase in the percentage of the GM maize in the diet. At that time up to 10% of deaths were preceded by a long-lasting paresis syndrome, with biochemical signs of kidney failure, as well as mucosal and epithelial problems.