Table 4.

Effect of dietary EL level and variety on immune response of Japanese quails.

Trait	Eucalyptus level (L)			Variety (V)		SEM	P value
	0%	0.1%	0.2%	Gray	White		L	V	L*V
Cell-mediated immunity (swelling difference %1)
After 24 h	33.9	38.2	34.0	40.6a	30.1b	0.027	0.47	<0.01	0.10
After 48 h	19.1	24.1	17.2	24.7a	15.6b	0.023	0.08	<0.01	0.14
After 72 h	7.7b	12.1a	8.8b	12.0a	7.1b	0.019	0.05	<0.01	0.93
Humoral immunity
NDV titer	5,257.5b	6,768.5a	5,461.8b	5,355.6	6,302.9	286.5	0.04	0.07	<0.01

^a,bMeans within a row with different superscript letters for each factor are significantly different.

Abbreviations: EL, Eucalyptus leaves; SEM, standard error of mean; NDV, Newcastle Disease Virus.

¹$\text{Swelling difference}=\frac{\mathit{swelling\; difference}}{\mathit{initial\; thickness\; of\; toe\; web}}\times 100$