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Table 1 General husbandry practices reported by the surveyed Swedish pig farms, divided by age group and farm size. The farms were divided based on herd size where sow holdings were classified as small if fewer than 100 sows, medium sized if 100–400 sows and large if more than 400 sows. Specialised fattening herds were classified as small, medium sized and large when annually producing < 5000, 5000–10,000 and > 10,000 pigs, respectively. Regarding total numbers, different letters (a-c) within a column indicate a statistical difference (p < 0.05) between age categories. Regarding herd sizes, different letters (d-e) within a row indicate a statistical difference (p < 0.05) between herd sizes. The differences were compared statistically using Chi-square tests. When numbers are written in italics, the distribution of the responses did not allow for chi-square analysis

From: Management practices related to the control of gastrointestinal parasites on Swedish pig farms

  Total Herd size
Small Medium Large
n % n % n % n %
Strict batch wise production
 Piglets 116/132 88b 15/24 63 74/80 93 27/28 96
 Growers 106/132 80b 12/24 50d 70/80 88e 24/28 86e
 Fatteners 89/119 75a 22/33 67 57/74 77 10/12 83
Outdoor access
 Piglets 13/132 10 9/24 38 4/80 5 0/28 0
 Growers 12/132 9 8/24 33 4/80 5 0/28 0
 Fatteners 10/119 8 8/33 24 4/74 5 0/12 0
 Sows 14/135 10 10/24 42 4/80 5 0/31 0
Liquid feed
 Growers 78/132 59b 5/24 21d 54/80 68e 19/28 68e
 Fatteners 97/119 82a 15/33 45 70/74 95 12/12 100
 Sows 90/135 67b 4/24 17d 59/80 74e 27/31 87e
Water source only over slatted floor
 Farrow pens 68/132 52a 8/24 33d 47/80 59e 13/28 46
 Grower pens 104/132 79b 10/24 42d 71/80 89e 23/28 82e
 Fattener pens 93/119 78b 18/33 55d 65/74 88e 10/12 83
 Dry sow pens 28/135 21c 1/24 4 17/80 21 10/31 32