Thanks for this information. Very troubling.
In 1819, Bartolomeo Bizio, a pharmacist from Padua, Italy, discovered and named S marcescens when he identified the bacterium as the cause of a miraculous bloody discoloration in a cornmeal mush called polenta. Bizio named Serratia in honor of an Italian physicist named Serrati, who invented the steamboat, and Bizio chose marcescens from the Latin word for decaying because the bloody pigment was found to deteriorate quickly.
If you have ever seen a pinkish growth in any damp dark place, it is Serratia. It's everwhere.