Diagnosis and Treatment of Infected Wounds in the Modern Era

Conclusions

• Clinical suspicion should drive wound cultures, because routine swabbing without signs of infection leads to misdiagnosis and unnecessary antibiotic use.
• Tissue culture remains the preferred standard when culturing is warranted, although it is more invasive than a swab.
• New diagnostic tools such as autofluorescence imaging, pH sensing, and microbial DNA analysis may improve detection of infected wounds, but each has important limitations and does not replace clinical judgment.
• Biofilms are common in chronic wounds and are a major reason these wounds fail to heal, so they must be actively considered in diagnosis and management.
• Effective biofilm management depends on sharp or surgical debridement, repeated cleansing, and post-debridement sampling rather than superficial swabbing.
• Bedside diagnostics still have major value and can provide rapid, low-tech answers in the right patient when used thoughtfully.
• Initial treatment of infected wounds should focus on debridement and therapeutic cleansing to reduce bacterial burden and remove necrotic or foreign material.
• Surfactant-based cleansers appear more useful than plain water or saline for penetrating biofilm.
• Empiric systemic antibiotics should generally target Staphylococcus aureus first, with Pseudomonas and other risk-based organisms added when location or exposure suggests it.
• Local epidemiology and the antibiogram are essential for choosing empiric antibiotics appropriately.
• There has been little meaningful progress in new systemic antibiotics for decades, largely because of high cost, limited superiority over generics, and short treatment courses.
• New local and adjunctive therapies such as silver or copper nanoparticles, bioelectric dressings, and antibiofilm surfactants show promise, but evidence is still limited and they are not yet a replacement for standard care.