Currently in the United States, there is a keen debate about the desirability of banning the use of antimicrobial growth promoters (AGPs) in farm animal production.  On the one hand, medical researchers and regulators believe that there is now convincing evidence that the use of antimicrobials in animal production is one factor contributing to the development of antimicrobial resistance in pathogens which infect humans.  On the other hand, representatives of the farming and animal health industries take the opposite view and point to the problems a ban on the use of AGPs would cause for those in farm animal production.  Attention is drawn to the fact that in Denmark where AGPs are no longer used there was a 30% increase in the amount of antimicrobials used to treat animals in 2000 compared with the previous year.