Adding some extra antibiotic powder fails to reduce an individual’s risk of infection during surgery to repair complex bone fractures, a new study reveals.
People experience the same kind of post-surgery infections whether doctors sprinkled one or two antibiotic powders into the wound, researchers at the University of Maryland Medical System reported in a study published April 15, 2026.
A researcher mentioned that surgeons should not expect benefit from this combination approach in routine practice. Doctors currently sprinkle Vancomycin powder into the surgical site with high-risk leg fractures. This, he mentioned, they do to lessen their risk of deep infections. But this medication targets only gram-positive bacteria, which are mostly found in surgical infections.
It is ineffective at preventing infections caused by gram-negative bacteria, which may also be involved in infecting broken bones. This prompted a study in which tobramycin powder, effective against gram-negative bacteria, was added to reduce the risk of infection further.
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In the clinical study, over 1,500 patients at trauma centers in the United States were enrolled and divided into two groups: those receiving vancomycin powder alone and those receiving vancomycin powder in combination with tobramycin powder.
The results found that infection rates did not differ significantly – 7.4% in one group and 6.6% in the other.
The scholars at the U.S. Centers for Disease Control and Prevention (CDC) also shared their views on preventing surgical site infections to support the ongoing study. According to them, Vancomycin alone remains a solid option for reducing gram-positive bacterial infections, but the data do not support routinely adding Tobramycin powder. Infection following a bone operation can lead to repeat surgeries, prolonged antibiotic doses, delayed healing, and enduring disability.
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Disclaimer:
This content is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting or changing any medication or treatment.