Table 1 Post vaccination geometric mean (mean ± SD) antibody titers of chickens increased over time by booster vaccination with disparity in titer between vaccine carrier types used

<1^f

<1^ab

<1^g

<1^d

<1^c

no

3.2 ± 0.6 (15)^a

5.7 ± 1.6 (15)c

4.7 ± 0.9 (15)^ac

3.6 ± 0.9 (14)^ab

7.1 ± 2.4 (14)a

no

1.6 ± 1.0 (15)^b

2.4 ± 1.5 (15)^d

1.8 ± 1.3 (15)^bd

1.7 ± 0.9 (14)^e

3.3 ± 1.2 (14)^f

no

2.3 ± 0.7 (15)^b

2.6 ± 1.1 (15)^d

2.1 ± 0.8 (15)^bd

1.9 ± 0.8 (14)^e

4.5 ± 2.1 (14)^f

no

2.3 ± 1.0 (15)b

2.4 ± 1.1 (15)^d

2.1 ± 1.4 (15)^bd

2.0 ± 0.7 (14)^e

3.3 ± 1.8 (14)^f

no

1.4 ± 0.6 (15)^f

2.2 ± 0.8 (15)^d

1.8 ± 0.8 (15)^bd

1.4 ± 0.8 (15)^e

2.4 ± 1.5 (15)^ed

no

2.1 ± 0.7 (15)^b

2.7 ± 0.8 (15)^d

2.4 ± 0.9 (15)^bd

1.5 ± 0.9 (15)^e

4.4 ± 1.9 (15)^f

no

1.2 ± 1.0 (15)^f

1.6 ± 1.1 (14)^d

1.1 ± 0.9 (14)^bd

0.4 ± 0.5 (14)^gb

1.9 + 1.0 (14)^ed

no

1.3 ± 0.8 (15)^b

2.4 ± 0.5 (13)^d

2.3 ± 0.7 (13)^bd

1.7 ± 0.8 (12)^e

2.4 ± 1.8 (12)^ed

no

1.4 ± 1.3 (15)^b

2.4 ± 0.9 (15)^d

2.3 ± 0.8 (15)^bd

2.1 ± 0.9 (15)^e

3.2 ± 2.0 (15)^f

no

1.3 ± 0.5 (15)^f

1.5 ± 0.6 (15)^d

1.3 ± 1.0 (15)^bd

2.1 ± 0.9 (15)^e

2.5 ± 0.8 (14)^ed

no

1.6 ± 1.2 (15)b

2.4 ± 0.6 (15)^d

1.7 ± 0.9 (15)^bd

1.5 ± 0.9 (15)^e

no

2.5 ± 1.4 (15)^ed

3.0 ± 1.3 (15)^a

3.7 ± 1.9 (15)^ab

3.6 ± 1.0 (15)^e

2.4 ± 1.2 (15)^fc

no

5.1 ± 2.0 (15)g

1.7 ± 1.0 (15)b

2.5 ± 1.3 (15)^d

2.4 ± 1.0 (15)^bd

2.0 ± 1.0 (15)^d

no

2.8 ± 1.8 (15)^ed

3.2 ± 1.2 (15)^a

4.2. ± 2.1 (15)^ab

3.9 ± 1.6 (15)^ac

2.7 ± 1.1 (15)^fc

no

6.8 ± 1.4 (15)g