Table 3.
Mean (geometric mean) of concentration × 103 of fungal colonies (CFU/m3) per type of bedding in relation to time of sampling; ‘on’ and ‘off’ indicating whether ionization was operating or not. HD = units with straw bedding and dry hay feed; LD = units with shavings bedding and haylage feed. Mean is only based on samples that did not reach the upper limit of 28.3 × 103 CFU/m3
| Ionization on | Ionization off | |||||||
|---|---|---|---|---|---|---|---|---|
| HD | LD | HD | LD | |||||
| Unit | N<UL/N a | Mean CFU/m3 (GM) | N<UL/N a | Mean CFU/m3 (GM) | N<UL/N a | Mean CFU/m3 (GM) | N<UL/N a | Mean CFU/m3 (GM) |
| Total | 7/24 | 24.0 (23.7) | 21/23 | 3.4 (2.9) | 5/20 | 20.1 (17.9) | 21/21 | 9.7 (4.8) |
| Morning | 0/9 | – | 8/9 | 5.1 (4.5) | 1/9 | 6.3 (6.3) | 9/9 | 11.0 (6.3) |
| Afternoon | 3/9 | 26.0 (25.9) | 8/8 | 2.4 (2.2) | 2/7 | 27.5 (24.3) | 8/8 | 6.6 (3.6) |
| Midnight | 4/6 | 24.3 (24.0) | 5/6 | 2.5 (2.2) | 2/4 | 19.7 (19.7) | 6/6 | 10.8 (4.6) |
CFU, colony‐forming units; HD, High dust; LD, low dust.
aNumber of samples below upper limit of detection (N<UL)/total number of samples (N); mean and GM are based on samples below upper limit of detection only.