Antimicrobial Drain Sponge Excilon™ AMD PHMB (Polyhexamethylene Biguanide) / Nonwoven 4 X 4 Inch Sterile2 Per Pack, 25 Packs Per Box, 12 Boxes Per Case Contain PHMB (Polyhexamethylene Biguanide) Resist bacterial colonization, reduce bacterial penetration, limit cross contamination, and maintain balance of native skin flora Reduces bacterial penetration through the dressing Broad spectrum effectiveness provides protection against gram , gram+ and fungi yeast microorganisms including MRSA and VRE Limits cross contamination from and to the patient,