Why Diabetic Foot Ulcers Can’t Finish the Job: The Microbial Clearance Problem

This episode explores why some diabetic foot ulcers remain inflamed yet fail to clear microbes, distinguishing contamination, colonization, local infection, and clinical infection. It explains how immune dysregulation, neutrophil extracellular traps (NETs), macrophage dysfunction, biofilm, ischemia, hypoxia, neuropathy, and necrotic tissue create an ecosystem that prevents healing.The episode emphasizes that antibiotics alone are not enough: effective care requires assessing perfusion, offloading, debridement, glycemic and systemic management, targeted antimicrobials when indicated, and ongoing surveillance to change the wound trajectory.