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In vitro acid tolerance of the selected Bacillus isolates.
| Isolate | Bacterial count (cfu/ml) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| At pH 6.4 | At pH 1.0 | At pH 2.0 | At pH 3.0 | |||||||||||||
| 0 h | 1 h | 2 h | 3 h | 0 h | 1 h | 2 h | 3 h | 0 h | 1 h | 2 h | 3 h | 0 h | 1 h | 2 h | 3 h | |
| Bacillus coagulans (B37) | 8.64 | 8.11 | 8.34 | 8.49 | 3.69 | 2.23 | - | - | 6.18 | 5.85 | 5.28 | 5.36 | 6.81 | 6.73 | 6.53 | 6.11 |
| Bacillus pumilus (B9) | 8.86 | 8.79 | 8.18 | 7.96 | 6.32 | 5.67 | 3.51 | 2.11 | 7.86 | 6.36 | 6.23 | 5.85 | 7.96 | 7.59 | 7.18 | 6.87 |
cfu=Colony-forming units
