Can Serratia marcescens grow on EMB Plates?!
Question: Yes, it may grow better at room temperature than 37 degrees and may even show some red pigment at room temperature. Most are nonpigmented.
It generally ferments lactose slowly, so you may not see the medium change to pinkish colors as it would if lactose was rapidly fermented.
There is a difference though between red pigment production and the color change due to lactose fermentation.
Answers: Yes, it may grow better at room temperature than 37 degrees and may even show some red pigment at room temperature. Most are nonpigmented.
It generally ferments lactose slowly, so you may not see the medium change to pinkish colors as it would if lactose was rapidly fermented.
There is a difference though between red pigment production and the color change due to lactose fermentation.