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Table 5 Effects of constant chronic heat stress on villus height and crypt depth of small intestine segments in growing-finishing pigs

From: Alterations in intestinal microbiota composition coincide with impaired intestinal morphology and dysfunctional ileal immune response in growing-finishing pigs under constant chronic heat stress

Items Treatments P-value
TN HS PF
Duodenum
 Villus height, μm 574.50 ± 25.54a 379.49 ± 36.00b 414.50 ± 25.26b < 0.001
 Crypt depth, μm 505.42 ± 17.15 449.10 ± 38.36 396.94 ± 41.88 0.115
 Ratio of villus height to crypt depth 1.14 ± 0.02a 0.84 ± 0.03b 1.07 ± 0.05a < 0.001
Jejunum
 Villus height, μm 510.37 ± 39.01a 319.29 ± 28.62b 384.90 ± 11.37b < 0.001
 Crypt depth, μm 292.53 ± 9.28a 218.69 ± 26.00b 218.78 ± 17.76b 0.021
 Ratio of villus height to crypt depth 1.73 ± 0.08a 1.49 ± 0.07b 1.80 ± 0.09a 0.042
Ileum
 Villus height, μm 526.36 ± 25.43a 298.98 ± 28.33b 367.27 ± 25.96b < 0.001
 Crypt depth, μm 403.73 ± 23.42 367.29 ± 35.48 328.54 ± 30.47 0.244
 Ratio of villus height to crypt depth 1.31 ± 0.03a 0.82 ± 0.04c 1.14 ± 0.06b < 0.001
  1. TN, thermal neutral conditions (25 ± 1 °C); HS, heat stress conditions (35 ± 1 °C); PF, pair-fed with HS with TN conditions (25 ± 1 °C). Data were expressed as mean ± SEM (n = 8 for TN and PF, n = 7 for HS). Treatments with different superscript letters were significantly different at P < 0.05