Hello all. I just got an e-mail back from Dr. Falkinham concerning our questions about serratia marcescens, which is one of the bacterias that Katherine was battling at the end. This specie is pink in color and is not to be confused with the methylobacterium that we sometimes see in our shower stalls and rings in the toilet. The serratia marcsecens comes from fecal matter and water contaminated with fecal waste. This particular bacteria is often caught in hospitals (ICU mostly) and nursing homes – for obvious reasons. Or could be picked up caring for someone who is incontinant or bed-ridden. So, that really nasty bug is most likely NOT in our homes. The pink slime in your bathrooms is likely methylobacterium which could technically cause you harm, but not likely. Just squirt it with clorox water in a spray bottle if you have it. I hope this allays some of the fears.