| Type of microbe | Storage time/months | ||||||
| 0 | 1 | 2 | 3 | 4 | 5 | Recommended value*** | |
| **TBC (cfu/g) | 6.9 × 103 | ND | ND | ND | ND | ND | <105 |
| Staphylococcus aurous | ND | ND | ND | 4.5 × 102 | 1.2 × 103 | 5.9 × 103 | <105 |
| Spore formers | 2.7 × 103 | ND | 7.0 × 102 | 8.5 × 102 | 5 × 10 | 9.5 × 102 | <105 |
| Coli-form | 1.1 × 102 | 1.1 × 103 | 2.5 × 102 | 2.5 × 102 | 1.1 × 103 | 1.4 × 102 | <103 |