Table 1 Summary statistics on pig herd types and herd sizes across year quarters. AMU: antimicrobial usage
From: Antimicrobial use in pig herds in Ireland: analysis of a national database (2019–2023)
Herd type | Farrow-to-finish unit | Breeder to Weaner unit | Finisher/fattening unit | Other | Total |
|---|---|---|---|---|---|
Herds-n | 178 | 33 | 140 | 8 | 359 |
Observations | 2,639 | 435 | 1,334 | 90 | 4,498 |
Herd size | |||||
Mean | 4359 | 1101 | 2468 | 2449 | 3445 |
Median | 3158 | 829 | 1697 | 1407 | 2300 |
25th%ile | 1445 | 562 | 766 | 429 | 972 |
75th%ile | 5820 | 1425 | 3177 | 4500 | 4650 |
Breeding pigs | |||||
Mean | 630 | 886 | 15 | 298 | 466 |
Median | 499 | 730 | 0 | 191 | 290 |
25th%ile | 220 | 430 | 0 | 0 | 0 |
75th%ile | 819 | 1200 | 0 | 450 | 680 |
AMU (mg/PCU) | |||||
Mean | 80.9 | 116.8 | 34.5 | 49.0 | 70.0 |
Median | 25.9 | 36.5 | 1.1 | 22.9 | 12.3 |
25th%ile | 4.4 | 4.8 | 0.3 | 1.1 | 1.3 |
75th%ile | 94.0 | 151.6 | 12.9 | 61.4 | 78.6 |
AMU (DDDvetPCU) | |||||
Mean | 5.4 | 21.9 | 2.2 | 2.6 | 6.0 |
Median | 1.9 | 7.3 | 0.1 | 1.0 | 1.1 |
25th%ile | 0.4 | 1.2 | 0.0 | 0.1 | 0.1 |
75th%ile | 6.0 | 33.1 | 0.9 | 4.6 | 5.5 |