Table 5 Effect of dietary Lactobacillus, medicinal plants extract, herb extract on the leucocyte profiles in laying hens against Salmonella gallinarum (n=10)

		Challenge	White blood cell (K/μL)					Heterophil/Lymphocyte ratio
			4d	8d	14d	Total		4d	8d	14d	Total
Treatments	NC	×	17.04	13.93	10.43	13.80		0.33	0.16	0.13	0.21
		○	27.96	18.00	11.23	19.06		0.94	0.28	0.16	0.46
	PC	×	15.65	19.77	10.06	15.16		0.40	0.43	0.17	0.33
		○	29.01	22.77	6.84	19.54		0.73	0.41	0.13	0.42
	LB	×	17.88	11.61	16.76	15.42		0.46	0.29	0.35	0.37
		○	28.26	18.06	19.25	21.86		0.72	0.35	0.30	0.46
	MPE	×	20.92	13.03	12.51	15.49		0.45	0.24	0.19	0.29
		○	29.79	19.18	15.62	21.53		0.77	0.48	0.25	0.50
	EO	×	14.35	17.48	12.09	14.64		0.30	0.30	0.13	0.24
		○	27.94	20.50	15.72	21.39		0.81	0.45	0.29	0.52
	SEM		1.98	1.12	1.18	1.01		0.07	0.03	0.03	0.03
Challenge	without Salmonella		17.17	15.16	12.37	14.90		0.39	0.28	0.19	0.29
	with Salmonella		28.59	19.70	13.73	20.68		0.79	0.39	0.23	0.47
Feed	NC		22.50	15.97	10.83	16.43		0.64	0.22	0.15	0.33
	PC		22.33	21.27	8.45	17.35		0.57	0.42	0.15	0.38
	LB		23.07	14.84	18.01	18.64		0.59	0.32	0.33	0.41
	MPE		25.36	16.11	14.07	18.51		0.61	0.36	0.22	0.40
	EO		21.15	18.99	13.91	18.01		0.56	0.38	0.21	0.38
Challenge			NS	NS	NS	NS		NS	NS	NS	NS
Feed			NS	NS	NS	NS		NS	NS	NS	NS
Challenge × feed			NS	NS	NS	NS		NS	NS	NS	NS

NC, basal diet; PC, basal diet with virginiamycin 10 ppm ＋ salinomycin 60 ppm; LB, Lactobacillus 0.1%; MPE, medicinal plants extract 100 ppm; EO, essential oil 100 ppm.NS: none significant.