While I was cleaning out my humidifier today, I noticed a red-ish residue in the reservoir. Curious, I did a google search and discovered the likely culprit is a bacteria called Serratia Marcescens. Apparently this bacteria is very common. I'm currently cleaning my humidifier out using a white vinegar/water solution.

How concerned should I be with this? I did a search on the net for the bacteria effecting pets, and it said often times it will infect a dog's water bowl, but no harmful effects happen. I tried finding information on the bacteria and amphibians, but didn't come up with much. Does anyone here have any experience with this?