Table 2. Biochemical characterization of Salmonella isolates using several methods.
|
Name of the tests |
Observation |
Result |
Interpretation |
|
Gram’s staining |
Pink in color, long rod shape |
- |
Salmonella spp.
|
|
MR test |
Red color appeared |
+ |
|
|
VP test |
No color change |
- |
|
|
Citrate test |
Dark green to vibrant blue |
+ |
|
|
Urease test |
The agar slant, butt remain light orange |
- |
|
|
Catalase test |
Bubbles were formed |
+ |
|
|
Oxidase test |
No color change |
- |
|
|
Motility test |
growth flaring from the line of inoculation |
+ |
|
|
H2S test |
Blackening of the medium |
+ |
|
|
Indole test |
Appearance of yellow color on top |
- |
*Positive results are denoted by (+) sign, while negative results are denoted by (-) sign.