Covidien Telfa AMD Antimicrobial Non-Adherent Island Dressing, 4" x 8" (7666). Telfa 1's AMD antimicrobial sponges are impregnated with PHMB (Polyhexamethylene Biguanide), a powerful yet safe antiseptic that has a broad range effectiveness against gram positive and gram negative microorganisms including some multi-drug resistant strains such as MRSA. Dressing provides healthcare facilities a low cost, prophylactic method of treatment without changing nursing protocol. In addition to its antimicrobial capabilities the Telfa AMD antimicrobial sponges non-adherent dressing has a perforated mylar film with an absorbent core ideal for use as a primary dressing for lightly draining wounds. 25/BX 4BX/CS. Priced per box. FREE Shipping!