Salmonella colonisation of laying hens following vaccination with killed and live attenuated commercial Salmonella vaccines
Atterbury RJ., Allen VM., Carrique‐Mas JJ., Davies RH.
The aim of this study was to determine the efficacy of a killed Salmonella vaccine and three live vaccines in preventing caecal colonisation of Hy‐line Brown pullets by Salmonella Enteritidis PT 4. The lowest number of Salmonella ‐positive birds following the largest challenge (10 8 cfu) was recorded for live vaccine 1. However, birds treated with the killed vaccine had a significantly lower number of salmonellae in their caeca compared with both the control group and the other vaccine groups (P<0˙05).