Antimicrobial stewardship: what is it, and how does it work?

Antimicrobial stewardship is emerging as a vital management tool in the efforts to contain antimicrobial resistance and retain the efficacy of available agents. It is based on a set of concepts about antimicrobial use and resistance that have been developed over the past 70 years. There are seven basic requirements for a stewardship program to function at a local level, including (1) 'executive' ownership of the issue, (2) consensus prescribing guidelines, (3) a local formulary with various levels of restricted access, (4) a local champion (or champions) who is a trusted peer, (5) authority to intervene in prescribing and/or dispensing, (6) authority for measurement of use, audit and feedback, and (7) access to reliable laboratory services and their cumulative resistance data. Stewardship programs are most advanced in larger public hospitals, but there is considerable interest and need for developing programs tailored to a wide range of settings in human and animal health, each with their own particular characteristics of access to antimicrobials and potential controls. The potential value of stewardship in food animal production is now recognised globally, and Australia has taken the first steps towards surveillance and stewardship in this sector, supported by a recently released national One Health strategy on the containment of antimicrobial resistance.