Table 3.

Alpha-1-acid glycoprotein (AGP) in serum

Item1	1 dpi2	3 dpi	5 dpi	7 dpi	9 dpi
Group 1	41.47 ± 0.953	40.84 ± 0.54	41.18 ± 2.60	40.78 ± 3.59	43.22 ± 2.89
Group 2	42.51 ± 0.91	43.89 ± 1.12*	41.87 ± 1.43	41.73 ± 2.00	125.10 ± 1.82**4
Group 3	41.85 ± 1.42	39.23 ± 4.95	41.20 ± 0.25	40.78 ± 0.35	123.85 ± 3.81**

¹Unchallenged control group (group 1), challenge group inoculated with an isolate of the KIIa genotype (kr/ADL110002/2011, group 2), and challenge group inoculated with an isolate of the ChVI genotype (kr/ADL120003/2012, group 3).

²dpi = days postinoculation.

³AGP level in the serum (arithmetic mean ± SD).

⁴At 9 dpi in group 2 (KIIa genotype), only 2 chickens were available for blood collection.

^*P ≤ 0.05,

^**P ≤ 0.01 using the Student t-test (SPSS 12.0K for Windows, SPSS Inc., Chicago, IL).