From: Assessment of exposure to influenza A viruses in pigs between weaning and market age
Phase of production and categories | % | ||||||||
---|---|---|---|---|---|---|---|---|---|
H3N2_A* | H3N2_B* | H3N2_C* | H3N2_H† | H1N2‡ | H1N1_P¶ | H1N1_C§ | H1N1_H† | ||
Nursery | Incidence (%) (95% CI) | 0 – | 66 (0.09, 0.99) | 0 – | 0 – | 0 – | 52 (0.37, 0.66) | 3 (0.01, 0.11) | 76 (0.63, 0.87) |
Prevalence (%) (95% CI) | 0 – | 21 (0.13, 0.33) | 6 (0.02, 0.15) | 4 (0.01, 0.11) | 5 (0.01, 0.13) | 45 (0.33, 0.57) | 2 (0.01, 0.09) | 73 (0.62, 0.83) | |
Proportion of study animals in strata defined by the serological exposure status at the start and end of study period | |||||||||
N–Na | 12.0 | 1.3 | 18.6 | 10.6 | 17.3 | 32.0 | 77.3 | 16.0 | |
N–Pb¥& | 0.0 | 2.6 | 0.0 | 0.0 | 0.0 | 34.7 | 2.6 | 53.3 | |
P–Nc | 85.3 | 74.6 | 72.0 | 82.6 | 74.6 | 21.3 | 17.3 | 9.3 | |
P–Pd¥ | 0.0 | 18.6 | 6.6 | 4.0 | 5.3 | 9.3 | 0.0 | 18.6 | |
Finisher | Incidence (%) (95% CI) | 97 (0.86, 0.99) | 26 (0.12, 0.45) | 5 (0.01, 0.19) | 2 (0.01, 0.14) | 2 (0.01, 0.14) | 95 (0.78, 0.99) | 3 (0.01, 0.11) | 76 (0.63, 0.87) |
Prevalence (%) (95% CI) | 97 (0.86, 0.99) | 21 (0.09, 0.37) | 5 (0.01, 0.17) | 2 (0.01, 0.13) | 2 (0.01, 0.13) | 92 (0.78, 0.98) | 2 (0.01, 0.09) | 73 (0.62, 0.83) | |
Proportion of study animals in strata defined by the serological exposure status at the start and end of study period | |||||||||
N–N | 1.3 | 29.3 | 42.7 | 46.7 | 46.7 | 1.3 | 77.3 | 16.0 | |
N–P | 49.3 | 10.7 | 2.7 | 1.3 | 1.3 | 29.3 | 2.6 | 53.3 | |
P–N | 0.0 | 10.7 | 5.3 | 2.7 | 2.7 | 2.7 | 17.3 | 9.3 | |
P–P | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 17.3 | 0.0 | 18.6 |