 This is a phase 3, randomized, controlled, blinded, multicenter study conducted in 3 parallel cohorts of diabetic patients with at least 1 infected foot ulcer. Patients will be randomized to receive 1 of 3 study treatments; systemic antibiotic therapy and standard ulcer care with either A daily application of a gentamicin-sponge, B daily application of a placebo-sponge or C no-sponge, in the ratio 2:1:1. 