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News
One week of antibiotics works as well as four-plus weeks for orthopedic infections. A noninferiority trial published in the NEJM found that patients who received ≤7 days of systemic antibiotics after surgery — paired with a local antibiotic implant — had similar treatment failure rates at 12 months compared to those on a standard multi-week course. The shorter group also reported far fewer antibiotic-related side effects.
Could a week of antibiotics replace a month-long course for bone and joint infections?
A new noninferiority trial published in the New England Journal of Medicine suggests yes — at least when a local antibiotic carrier is implanted during surgery. The SOLARIO trial enrolled 475 adults undergoing surgery for orthopedic infections, all of whom received a licensed local antibiotic implant. Patients were then randomized to either ≤7 days or ≥4 weeks of postoperative systemic antibiotics.
The results: definite treatment failure at 12 months occurred in 11.1% of the short-duration group vs. 14.1% in the long-duration group — a difference that met the trial's noninferiority margin. The shorter course also meant fewer side effects and shorter hospital stays. Researchers noted that direct costs are also likely to be lower with the short-duration approach.
By the Numbers:
Why it matters: The standard of care for orthopedic infections has long required 4+ weeks of systemic antibiotics — a regimen that carries significant side effect burden and cost. This trial challenges that norm, suggesting that local antibiotic delivery during surgery could allow clinicians to safely shorten systemic treatment, improving patient experience and antimicrobial stewardship.
