Meta-analysis of topical vancomycin powder for microbial profile in spinal surgical site infections

Area of Science:

• Infectious Diseases
• Surgical Site Infections
• Pharmacology

Background:

• Spinal surgical site infections (SSIs) pose a significant clinical challenge.
• Gram-positive bacteria, particularly methicillin-resistant staphylococcus, are common pathogens in SSIs.
• Preventive strategies are crucial to reduce SSI incidence and associated morbidity.

Purpose of the Study:

• To systematically evaluate the efficacy of topical vancomycin powder in altering the microbial profile of spinal SSIs.
• To assess the impact of topical vancomycin on specific bacterial types, including gram-positive, gram-negative, and polymicrobial infections.

Main Methods:

• A comprehensive literature search was conducted across MEDLINE, EMBASE, and Cochrane databases.
• The review included all studies on topical vancomycin powder for preventing postoperative spinal infections up to September 30, 2018.
• A meta-analysis of 21 studies involving 15,548 patients was performed.

Main Results:

• Topical vancomycin powder significantly reduced the incidence of gram-positive bacterial infections (OR 0.41, P < 0.00001).
• It was effective in lowering infection rates of methicillin-resistant staphylococcus (OR 0.34, P < 0.0001).
• No significant impact was observed on polymicrobial (OR 0.30, P = 0.03) or gram-negative bacterial infections (OR 0.94, P = 0.75).

Conclusions:

• Topical vancomycin powder is effective in reducing gram-positive and methicillin-resistant staphylococcus infections in spinal surgical sites.
• It does not appear to increase the risk of gram-negative or polymicrobial infections.
• Further large-scale, high-quality studies are recommended to confirm these findings and guide clinical practice.