| Characteristic | E. Coli | S. Aureus |
| Shape | ||
| Arrangement | ||
| Approximate Size | ||
| Gram Stain Result |
| Characteristics | E. Coli | S. Aureus |
| Shape | Rod shape | Round shape |
| Arrangement |
single cell arrangements, occur in clumps |
Diplococus or streptococcus arrangement. |
| Approximate size | width 0.5 πm length 2 πm | upto 1πm in diameter |
| Gram stain result | Gram negative | Gram positive |
Characteristic E. Coli S. Aureus Shape Arrangement Approximate Size Gram Stain Result