General Information:
S. marcesens, S. liqefaciens, S. odorifera are most clinically significant
Pathogenesis and Infectious Disease:
- disease occurs primarily in debilitated individuals
- S. marcescens is the most common isolte
- an opportunist associated with pneumonia, bacteremia, septicemia, endocarditis, localized cellulitis, burn infections, and urinary tract infections developing from indwelling catheters
Test Results:
- Lactose fermentation: positive (pink colonies) – late fermenters
- HE/XLD : positive (yellow or colorless colonies)
- IMViC :
- S. marcescens : -/-/+/+ red pigment
- S. odorifera : v/+/v/+ dirt, musty like potatoes
- S. liquefaciens : -/+/+/+
- TSI : A/A
- H2S : negative
- Motitlity : positive
- ONPG : positive
- Lysine and Ornithine : positive
Serratia sp.
Serratia marcescens on C.L.E.D. Agar
