Table 3. Effect of combined supplementation of catechin and vitamin C supplementation on composition of leukocyte and erythrocyte profile in broilers during high temperature

Vitamin C (mg/kg)	0			250			SEM	P-value¹
Catechin (mg/kg)	0	600	1,200	0	600	1,200	SEM	C	V	C × V
WBC (K/uL)	25.05^a	21.37^a	19.95^a	22.73^ab	20.79^a	22.44^ab	0.48	0.024	0.891	0.885
HE (K/uL)	8.07^a	6.44^b	5.98^b	7.00^ab	6.16^b	6.84^ab	0.21	0.033	0.707	0.693
LY (K/uL)	12.80^a	11.55^b	10.90^b	12.14^ab	11.43^b	12.06^ab	0.17	0.026	0.718	0.701
H/L ratio	0.62	0.55	0.54	0.57	0.53	0.56	0.01	0.142	0.473	0.467
MO (K/uL)	2.44^a	2.22^ab	2.05^b	2.24^ab	2.14^ab	2.29^ab	0.04	0.227	0.886	0.883
EO (K/uL)	1.26^a	0.85^b	0.76^b	1.00^b	0.80^b	0.92^b	0.04	0.005	0.575	0.544
BA (K/uL)	0.48^a	0.28^b	0.25^b	0.32^b	0.25^b	0.31^b	0.02	0.019	0.318	0.287
RBC (K/uL)	2.41^a	2.11^b	2.04^b	2.16^b	2.09^b	2.17^b	0.02	0.005	0.407	0.349
Hb (g/dL)	8.72^a	7.71^b	7.48^b	7.90^b	7.60^b	7.85^b	0.09	0.003	0.323	0.267
HCT (%)	26.00^a	22.78^b	22.63^b	23.40^b	22.15^b	22.50^b	0.31	0.003	0.072	0.050
MCV (fL)	107.84^abc	107.88^abc	110.72^a	108.22^ab	105.69^bc	103.42^c	0.65	0.721	0.018	0.016
MCH (pg/dL)	36.28	36.56	36.60	36.56	36.33	36.19	0.19	0.995	0.756	0.762
MCHC (g/dL)	33.63^ab	33.88^ab	33.13^b	33.84^ab	34.44^ab	35.03^a	0.21	0.690	0.035	0.035

Means in same rows with different superscripts are significantly different (P<0.05).
C, catechin; V, vitamin C; C × V, catechin × vitamin C.
WBC, white blood cells; HE, heterophil; LY, lymphocytes; H/L ratio, heterophil/lymphocytes; Mo, monocytes; EO, eosinophils; BA, basophils; RBC, red blood cells; Hb, hemoglobulin; HCT, hematocrit; MCV, mean corpuscular volume; MCH, mean corpuscular hemoglobulin; MCHC, mean corpuscular hemoglobulin concentration.
SEM, standard error of means.