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Table 2 Summary of immune and performance traits for pigs from SPF and non-SPF farms1

From: Traits associated with innate and adaptive immunity in pigs: heritability and associations with performance under different health status conditions

Health status SPF Non-SPF
Number of pigs tested   
- immune traits 674 606
- performance traits 1549 1093
Measurement (units) Mean (variance) Mean (variance)
White blood cells 22.2 (16.9) 24.0 (9.4)
MNL% 70.2 (9.10) 71.2 (11.6)
PMNL% 29.9 (9.10) 28.9 (11.6)
PBML subsets:   
   CD4+ 17.8 (4.87) 18.0 (5.64)
   CD8α+ 28.8 (7.16) 27.4 (6.69)
CD4+CD8α+ 7.51 (2.99) 7.29 (3.30)
CD4+CD8α- 10.2 (3.83) 11.3 (3.79)
   CD8αβ+ 14.2 (4.57) 11.8 (4.02)
   CD11R1+ total 14.0 (4.49) 14.1 (5.38)
CD11R1+CD8α+ 5.57 (2.94) 4.48 (2.61)
CD11R1+CD8α- 8.37 (3.11) 8.43 (3.65)
   γδ+ T cells 29.2 (8.36) 33.2 (12.5)
   B cells 12.4 (5.33) 14.5 (6.19)
   Monocytes 10.6 (4.85) 9.86 (4.09)
   CD14+ 5.21 (2.48) 6.18 (3.45)
   CD16+ 18.0 (5.00) 18.4 (6.26)
APP, μg/ml:   
   Haptoglobin 0.78 (0.62) 0.69 (0.65)
   TTR 442.6 (170.0) 555.3 (141.7)
   CRP 145.6 (164.6) 144.4 (133.0)
   AGP 744.8 (278.7) 388.3 (165.3)
ADG, kg/d 0.86 (0.16) 0.85 (0.17)
   age (d), at start-test 80.9 (9.4) 94.7 (10.1)
   age (d), at end-test 146 (10.4) 151 (12.1)
Ag density:   
   all CD8α+ cells 34185 (22820) 28936 (6936)
   CD8α+ "dim" cells 15423 (9521) 13422 (3330)
   CD8α+ "bright" cells 66368 (42468) 61150 (14483)
   all CD8β+ cells 27046 (16257) 20692 (4932)
  1. 1 White blood cells expressed as no. cells × 106/mL, PBML sub-sets expressed as proportion of mononuclear leucocytes and antigen density expressed as the number of antibody binding sites per cell (see Materials and Methods).