| Characteristics |
Lactobacillus |
Pseudomonas |
Saccharomyces |
Aspergillus |
Streptomyces |
| Colony morphology |
White, mucoid |
Fluorescent, mucoid |
Creamy white, mucoid, smooth |
Black fuzzy mat |
White, dry, powdery |
| Cell shape |
Rods |
Rods |
Ovoid budding cells |
Conidia arising from conidiophore |
Filamentous rods |
| Gram stain |
Gram positive |
Gram negative |
|
|
Gram Positive |
| Motility |
Non-motile |
Motile |
|
|
|
| Catalase |
- |
+ |
|
|
|
| Oxidase |
- |
+ |
|
|
|
| Indole production |
- |
- |
|
|
|
| Methyl Red |
- |
- |
|
|
|
| Voges-Proskauer |
- |
- |
|
|
|
| Citrate utilization |
- |
+ |
|
|
|
| Glucose fermentation |
+ |
- |
+ |
- |
|
| Lactose fermentation |
+ |
- |
+ |
- |
|
| Sucrose fermentation |
+ |
- |
+ |
- |
|
| Triple Sugar Iron |
Acid butt, acid slant |
Alkaline butt, alkaline slant |
|
|
|
| Urease |
- |
+ |
|
|
|
| Casein hydrolysis |
|
|
|
|
+ |
| Tyrosine hydrolysis |
|
|
|
|
+ |
| Xanthine hydrolysis |
|
|
|
|
+ |
+ = positive, - = negative |
