Abstract
The use of antimicrobial drugs (AMDs) in farm animal medicine is both necessary and justified on welfare and economic grounds. However, antimicrobial resistance in microorganisms colonising farm animal species is a growing problem, despite encouragement to use these drugs in a prudent manner. At this time, evidence of the link between the use of medicines in farm animals and the emergence of resistance in human microorganisms remains limited. Nevertheless, we must continue to strive to achieve rational use and optimisation of dosage regimens of AMDs to maintain their effectiveness and thereby ensure animal welfare.