Table 1 The CFU counts quantified by category of growth on agar plates, corresponding to colony forming units per 0.1 ml transport medium
Grading score | Growth descriptor | CFU |
|---|---|---|
0, blue | None | 0 |
1, dark blue | Very sparse | 1–10 |
2, orange | Sparse | 11–100 |
3, burnt orange | Moderate | 101–1000 |
4, dark orange | Heavy | 1001–10000 |
5, deep blue | Very heavy | > 10000 |