Table 5 Number (percentage) of influenza A virus rRT-PCR positive litters before and after interventions measured by udder skin wipes by farm. Statistical significance was measured between pre-intervention and post-intervention positive proportions
Experimental group | Farm | Pre-intervention IAV positivity (%) | Post-intervention positivity (%) | P value^ |
|---|---|---|---|---|
Control | F | 73/90a (81.1) | 71/90 (78.9) | 0.85 |
Treatment | A | 62/90 (68.9) | 56/90 (62.2) | 0.43 |
Treatment | B | 31/90 (34.4) | 12/90 (13.3) | 0.002 |
Treatment | C | 7/90 (7.7) | 0/90 (0) | 0.01 |
Treatment | D | 13/90 (14.4) | 0/90 (0) | 0.0002 |
Treatment | E | 12/90 (13.3) | 0/90 (0) | 0.0003 |
Total treatmentb | – | 125/450 (27.8) | 68/450 (15.1) | < 0.0001 |