Table 3. Effect of THI on blood profiles of finishing pigs

Item Treatments SEM p-value
Temperature (°C) 23–24 32–33
Humidity (%) 35 80
THI1) 68 87
WBC (103 /μL)
D0 19.81 19.92 1.14 0.945
D14 20.26 17.88 0.53 0.013
RBC (106 /μL)
D0 6.06 6.13 0.37 0.891
D14 6.14 6.42 0.27 0.484
HGB (g/dL)
D0 10.93 10.34 0.81 0.622
D14 10.93 10.92 0.81 0.995
HCT (%)
D0 32.06 30.79 1.26 0.499
D14 32.84 33.14 1.73 0.905
PLT (103 /μL)
D0 454.32 413.42 31.67 0.388
D14 474.49 403.31 26.35 0.093
MCV (fl)
D0 49.25 49.29 1.26 0.984
D14 47.37 49.24 1.75 0.478
MCH (pg)
D0 15.89 15.79 0.62 0.913
D14 15.99 15.99 0.69 0.998
MCHC (g/dL)
D0 32.24 32.34 0.60 0.915
D14 32.68 32.52 0.69 0.875
The data reported represent the means of 12 replicates (5 pigs/pen).
THI = (1.8 × temperature + 32) – [(0.55 – 0.0055 × relative humidity) × (1.8 × temperature – 26.8)].
THI, temperature-humidity index; WBC, white blood cell; RBC, red blood cell; HGB, hemoglobin; HCT, hematocrit; PLT, platelet; MCV, mean cell volume; MCH, mean corpuscular hemoglobin; MCHC, mean corpuscular hemoglobin concentration.