Table 5. Bacterial counts (CFUs)A for honey bee cropsB cultured under different conditions.
Growth conditions | Workers sampled inside the hive | Workers sampled outside the hive | |||
MediaC | AtmD | NectarE (9) | NursesF (10) | General (12) | Pollen (12) |
MRS | O2 A | 0.69±0.85 | 3.60±1.31 | 11.93±6.40 | 7.18±5.54 |
MRS | CO2 | 1.97±1.06 | 3.99±1.49 | 8.75±4.90 | 6.78±4.39 |
TSA | O2 | 0.013±0.012 | 0.026±0.009 | 3.26±1.45 | 2.11±1.37 |
TSA | CO2 | 0.83±0.52 | 2.21±0.96 | 3.41±1.21 | 5.63±3.56 |
Mean ± SE colony forming units per crop; multiply listed values by 105,
Crop is the foregut or social stomach. Sample size in parentheses.
MRS: de Man, Rogosa and Sharpe media; pH 5.7, TSA: Tryptic soy agar; pH 7.3
Atmosphere; O2 = Ambient conditions, CO2 = Ambient conditions containing 5% CO2.
Workers with empty crops processing nectar.
Workers with full crops attending to brood.