Soil bacteria and human pathogens have recently swapped several antibiotic-resistance genes, suggesting that environmental bacteria may be contributing to ongoing clinical challenges of antibiotic resistance (Forsberg KJ et al. Science. doi:10.1126/science.1220761 [published online August 31, 2012]).
Hampton T. Clues to Antibiotic Resistance. JAMA. 2012;308(13):1310. doi:10.1001/jama.2012.12679