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Reporting of non-tuberculous mycobacterial growth on middlebrook 7H10 medium.
| Colony Count | Interpretation |
|---|---|
| None | Negative |
| <50 | Actual count |
| 50–100 | + |
| 100–200 | ++ |
| 200–500 (Almost confluent growth) | +++ |
| >500 (Confluent growth) | ++++ |
| Appearance of Colonies | |
| White, Cream, Buff | Non-chromogenic |
| Lemon, Yellow, Orange, Red | Chromogenic |
