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Oral immunisation of laying hens with the live vaccine strains of TAD Salmonella vac ? E and TAD Salmonella vac ? T reduces internal egg contamination with Salmonella Enteritidis.[J].Inne Gantois;Richard Ducatelle;Leen Timbermont;Filip Boyen;Lotte Bohez;Freddy Haesebrouck;Frank Pasmans;Filip van Immerseel.Vaccine.2006, 37

