The pink or reddish film around shower grout, drains, and toilet bowls is often caused by a bacterium called *Serratia marcescens*, not mold. This organism forms a slippery biofilm in warm, moist environments, feeding on fatty deposits from soap and shampoo residue.
For most healthy adults, exposure poses a low risk. However, it can cause infections—such as UTIs, wound contamination, or eye inflammation—in immunocompromised individuals, infants, or older adults if it enters open wounds or eyes.
Removing the biofilm requires physical scrubbing combined with bleach or hydrogen peroxide-based disinfectants. Long-term prevention relies on controlling moisture by running exhaust fans, drying wet surfaces, and regularly washing shower curtains and tile grout. CLICK BELOW TO READ MORE…
