What Causes Recurring Pink Biofilm (Serratia marcescens) in Guest...

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2026-06-03 11:54:30 -

What Causes Recurring Pink Biofilm (Serratia marcescens) in Guest Bathroom Corners

Every housekeeping professional has encountered that persistent, slimy pink residue that inevitably reappears in the corners of shower stalls, around drains, and along the edges of bathroom tiles. While it might look like simple soap scum or mineral buildup, this discoloration is actually a resilient bacterium known as Serratia marcescens. Thriving in damp, warm environments, this airborne...

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