Figure 1From: Prevention of egg contamination by Salmonella Enteritidis after oral vaccination of laying hens with Salmonella Enteritidis ΔtolC and ΔacrABacrEFmdtABC mutants [OD(sample) − OD(negative control)]/[OD(positive control) − OD(negative control)] measured in the ELISA detecting anti- Salmonella LPS antibodies. Serum of 18-week old laying hens, vaccinated at day 1, 6 weeks of age and 16 weeks of age with Salmonella Enteritidis 147 ΔtolC and Salmonella Enteritidis 147 ΔacrABacrEFmdtABC was analysed.Back to article page