Table 1. Biochemical reactions of Ss1 compared with common strains of S. marcescens *.
| Test | Ss1 | S. marcescens (%) |
|---|---|---|
| 2-nitrophenyl β-D-galactopyranoside | + | 95 |
| arginine dihydrolase | - | 0 |
| lysine decarboxylase | - | 99 |
| ornithine decarboxylase | + | 99 |
| citrate utilization | - | 98 |
| hydrogen sulfide production | - | 0 |
| Christensen urease | + | 15 |
| tryptophan deaminase | - | NA |
| indole | - | 1 |
| acetyl-methyl-carbinol (Voges-Proskauer)# | + | 98 |
| gelatinase | - | 90 |
| D-glucose | + | 100 |
| D-mannitol | + | 99 |
| myo-inositol | - | 75 |
| D-sorbitol | + | 99 |
| L-rhamnose | - | 0 |
| D-sucrose | + | 99 |
| melibiose | - | 0 |
| amygdalin | - | NA |
| L-arabinose | - | 0 |
| lactose | - | 2 |
| adonitol | + | 40 |
| maltose | + | 96 |
| trehalose | + | 99 |
| cellobiose | - | 5 |
| glycerol | + | 95 |
| raffinose | + | 2 |
| dulcitol | - | 0 |
| mucate | - | 0 |
| D-xylose | + | 7 |
| Jordan’s tartrate | + | 75 |
| methyl red | + | 20 |
| esculin hydrolysis | - | 95 |
| DNase | + | 98 |
All reactions were incubated at 28°C except DNase (22°C).
*Percentage of S. marcescens showing positive results as reported [34].
#The Voges-Proskauer test was carried out in tube media.
NA = information not available.