SERRATIA MARCESCENS

The genus Serratia belongs to the family Enterobacteriaceae. The most important for human medicine species Serratia marcescens, Serratia liquefaciens and Serratia rubidea. Serratia species occur in the soil, on plants and in water. In the healthy population, they can be other than Enterobacter and Klebsiella, only occasionally detected in the gastrointestinal tract or upper respiratory tract. The microorganisms are flagellated peritrisch. The cultivation in the laboratory is straightforward. The only Enterobacteriaceae kind they are to form the three enzymes DNAse, gelatinase and lipase capable. Citrate can be utilized as the sole carbon source. Hydrogen sulfide is not formed. Serratia rubidea and some strains of Serratia marcescens form without air a red dye (Prodigiosin)... Serratia marcescens and Serratia liquefaciens are mainly cause of hospital-acquired infections. In immunocompromised patients, they can cause wound infections, infections of the kidney and urinary tract,..

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