Effects of tannic acid on the immunity and intestinal health of broiler chickens with necrotic enteritis infection

Table 6 Effects of tannic acid on coccidia oocysts number in feces of broilers with NE

	PC	PTA1	PTA2	PTA3	PTA4	P-value¹	Linear²	Quadratic²
d 25	4.69 ± 0.03	4.60 ± 0.06	4.59 ± 0.03	4.59 ± 0.06	4.49 ± 0.04	0.064	0.008	0.954
d 26	4.78 ± 0.04^a	4.75 ± 0.02^a	4.66 ± 0.02^b	4.61 ± 0.03^b	4.61 ± 0.01^b	< 0.001	< 0.001	0.370
d 27	4.63 ± 0.03^a	4.54 ± 0.02^ab	4.56 ± 0.03^ab	4.49 ± 0.03^bc	4.43 ± 0.04^c	0.001	< 0.001	0.747
d 28	4.52 ± 0.04^a	4.50 ± 0.04^ab	4.43 ± 0.02^abc	4.41 ± 0.03^b	4.39 ± 0.03^c	0.027	0.002	0.789

n = 7. Data are the mean ± SEM. NC no tannic acid treatment or NE infection, PC NE infection + 0 mg/kg tannic acid, PTA1 NE infection + 250 mg/kg tannic acid, PTA2 NE infection + 500 mg/kg tannic acid, PTA3 NE infection + 750 mg/kg tannic acid, PTA4 NE infection + 1,000 mg/kg tannic acid
¹Overall P-values obtained from ANOVA; ²P-values obtained using contrast trend analysis. ^a^–^cDifferent lower-case letters in the same column indicate significant differences (P < 0.05)

ISSN: 2049-1891