| Tetrahymena thermophila | Tetrahymena pyriformis | |||||
| Density | Morphology | Mobility | Density | Morphology | Mobility | |
| PPYE | +++ | Pear-Shaped | Rapid moving | +++ | Pear-Shaped | Rapid moving |
| NBRIP | + | Atypical Form >>> Pear-Shaped | Slow moving | + | Atypical Form >>> Pear-Shaped | Slow moving |