Old and busted: Antibiotikaresistente Keime.

New hotness: Desinfektionsmittelresistente Keime.

Hartmann, by the way, recommends dusting with a damp cloth instead of using antimicrobial solutions, which can make bacteria more resistant to antibiotics.

Antimicrobial solutions wäre sowas wie Sagrotan bei uns. (Danke, Peter)