More is better
Reviewing the science behind duration of antimicrobial therapy
Keywords:antimicrobial regimen, duration of therapy, antimicrobial stewardship
Antimicrobial resistance concerns have created a renewed interest in antimicrobial stewardship programs in both human and veterinary medicine. Due to the associated logistical and administrative burdens, formal antimicrobial stewardship programs have seen limited adoption outside of large institutional care centers. However, one of the key components of these programs is to optimize antimicrobial therapy - administration: of the right drug, to the right patient, at the right dose, by the right route, for the right duration. Optimizing dosing regimens does not have the same logistical burdens as a formal program, it simply requires evidential support and implementation by individual clinicians; which begs the question, "what is the basis for our current duration of antibiotic therapy recommendations?". To answer this question, a literature search was conducted to evaluate the scientific basis to support current recommendations for duration of therapy in veterinary medicine. Overall, the quantity and quality of scientific studies to support a specific duration oftherapy for a specific antimicrobial was underwhelming. However, the limited data generally supports the assumption that shorter durations of therapy can be effective and should be more thoroughly investigated.