Submitted to: Poultry Science Meeting
Publication Type: Abstract Only
Publication Acceptance Date: March 27, 2012
Publication Date: July 9, 2012
Citation: Montiel, E.R., Buhr, R.J., Cox Jr, N.A., Hofacre, C.L., Davis, A.J., Wilson, J.L. 2012. Impact of Skip a Day and Every Day Feeding Programs on the Colonization Rates of Salmonella Enteritidis in Broiler Breeder Pullets. Poultry Science Meeting. 91(Suppl. 1):17. p7-8. Technical Abstract: The impact of feeding programs in the colonization rate after challenge with Salmonella enteritidis was investigated. Broiler breeder pullets from were vaccinated at 19 d of incubation with herpesvirus of turkeys (HVT) + chicken herpesvirus (SB1), or a vector HVT (vHVT) + Infectious bursal disease (IBD) vaccine. The chicks were placed in an experimental pullet facility at the University of Georgia. The pullets vaccinated with HVT +SB1 were fed skip a day (SAD). The pullets vaccinated with vHVT+IBD were divided into 3 feeding groups of approximately 200 birds each as follows: 1) skip a day (SAD); 2) every day in the trough feeder (EDT); 3) every day on the litter (EDL). All groups were fed daily after light stimulation at 22 wk of age. At 22, 35, and 65 wk of age, groups of 10 birds were moved to a level 2 biosecurity facility and challenged orally with 10^7cfu/mL of a Nalidixic acid-resistant Salmonella Enteritidis strain. All birds were maintained on litter using individual pens for each feeding treatment. Spleen and ceca were collected 12 d after challenge and used to determine S. Enteritidis colonization. There was a decrease in the colonization rate of S. Enteritidis in spleen and ceca ranging between 10 and 68% at 22 and 65 wk of age in the birds fed EDL as compared with the SAD and EDT fed groups. Within the SAD groups, colonization rate was 10-50% lower in the birds that received the vHVT+IBD vaccine as compared with the group receiving HVT+SB1 vaccination. There were no significant differences in colonization rates among groups at 35 wk of age. The results obtained suggest that feeding broiler breeder pullets on the litter may contribute to decrease the rates of S. Enteritidis colonization after challenge. The use of a vHVT+IBD vaccine in ovo decreased S. Enteritidis colonization in the spleen in pullets fed using the SAD feeding program.