Table 1.

Vaccination protocols using live and inactivated Salmonella vaccines in layer hens

Group code	Vaccination regimen
C	No vaccination – control group
V0‐V3	Livea vaccine PO at day‐old and 3 weeks
V0‐V3‐N12	Livea vaccine PO at day‐old and 3 weeks and inactivatedb vaccine IM at 12 weeks
V0‐V3‐V6	Livea vaccine PO at day‐old, 3 and 6 weeks
V0‐V3‐V6‐N12	Livea vaccine PO at day‐old, 3 and 6 weeks and inactivatedb vaccine IM at 12 weeks
N6‐N12	Inactivatedb vaccine IM at 6 and 12 weeks
V0‐V3‐N6‐N12	Livea vaccine PO at day‐old and 3 weeks; inactivatedb vaccine IM at 6 and 12 weeks
VS4‐VS8	Live vaccine by SC injectionc at 4 and 8 weeks
V0‐V4‐V14	Livea vaccine PO at day‐old, 4 and 14 weeks

^aBioproperties Vaxsafe® ST by oral gavage at 108 CFU/bird.

^bIntervet (MSD) Inactivated Salmonella vaccine at 0.5 mL/bird by IM injection.

^cBioproperties Vaxsafe® ST by SC injection at 108 CFU/bird.

CFU, colony‐forming units.