Table 4.

Viral shedding titers in oropharyngeal swab samples from the vaccinated birds after wild-type (WT) virus challenge.

	Classical IBV challenge			Variant IBV challenge
DPIa	WT IBM41 challenge control	att-IBM41 vaccinated	att-IB2 vaccinated	WT IBvar2 challenge control	att-IBvar2 vaccinated
3	4.26 ± 0.98b	1.14 ± 1.38*	2.14 ± 0.83*	4.48 ± 0.59	2.10 ± 0.28
	(10/10)	(4/10)	(5/10)	(10/10)	(2/10)
5	3.33 ± 0.77	NDc	ND	3.05 ± 0.75	ND
	(7/10)			(10/10)
7	1.57 ± 0.52	ND	ND	2.17 ± 0.57	ND
	(6/10)			(7/10)

^aDPI; days post-infection.

^bMean EID₅₀/ml (positive/total tested).

^cND; not detected.

*Indicate significant difference compared to the corresponding challenge virus group (P < 0.01).