Genus Serratia is a group of Gram-negative bacilli that have been extensively studied for their role in various human infections. The genus belongs to the family Enterobacteriaceae and is commonly found in soil, water, and plants. Synonyms for the genus Serratia include Rhabdothrix, Microserrata, and Bacterium liquefaciens. Some strains of Serratia are known to produce various pigments, including prodigiosin, which gives the bacteria a distinctive red color. Serratia marcescens, in particular, has been shown to cause a wide range of infections, including wound infections, pneumonia, and urinary tract infections. Due to their high resistance to various antibiotics, Serratia strains can be a serious threat to public health.