A catheter assembly (110, 210) comprising a catheter (130, 230) and a receptacle (120, 220) is disclosed. The receptacle is arranged to accommodate at least part of said catheter and having at least one opening (123) for withdrawal of said catheter. Further, the receptacle is provided with an antimicrobial compound (301) at least in the vicinity of the opening and at least on the outer surface of the receptacle, said antimicrobial compound inhibiting microbes from being transferred to said catheter while being withdrawn through said at least one opening.