http://arstechnica.com/science/news/2011/03/drug-resistant-bacteria-to-humans-from-farms-via-food.arsQuote:
Microbiologists have been curious how that might be. They have started to look closely at whether antibiotic use in livestock is stimulating ESBL resistance instead, and they have made provocative findings. In the Netherlands, for instance—which has conservative human antibiotic use, but the most liberal agricultural antibiotic use of any EU member—the percentage of E. coli that was found in the guts of chickens and was carrying ESBL went up five times over between 2003 and 2008.