<qa>  What is the name of the treatment that is allowed in the protocol?Study arm 1: PRF with amikacin and teicoplanin Study arm 2: PRF with placebo 0.9 sodium chloride Study arm 3: PRF with PHMB polyhexanid plus Macrogolol Lavasorb Study arm 4: Acticoat 7 wound dressing as active control Patients with infected chronic wounds may be included in this trial. Infection shall be diagnosed by an experienced senior infectious diseases specialist. Patients with untreated peripheral vascular occlusive disease as defined by an ABI ancle brachial index of 0,7 are excluded from the trial as are patients with an uncontrolled diabetes mellitus or patients who have not received sufficient treatment for a diabetic foot syndrome. Any underlying illness will be treated following standard of care. In case of chronic venous insufficiency four-layered compression bandages will be applied each visit if tolerated by the patient. Alternatively compression stockings Class III are permitted. This is mentioned as Disease specific treatment in the protocol. 