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DOSSIER
Pathogenesis of egg infections by Salmonella and the implementation of preventive measures – Second Part
F. Van immerseel and R. Ducatelle Ghent University, Faculty of Veterinary Medicine, Department of Pathology, Bacteriology and Avian Diseases, Salisburylaan, Merelbeke
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Early protection has been demonstrated after primary live vaccine administration, early post-hatch, but this effect is serotype-specific, while cross-protection between some serotypes has been demonstrated after booster immunisations. Vaccines can only be efficient when biosecurity is optimal. A variety of nutritional strategies can be used to reduce Salmonella colonization, also for broilers. It is a utopia to eradicate Salmonella from chickens and the environment, but one should try to aim for appropriate levels of protection, and thus low flock prevalence and within-flock prevalence, and low individual colonization levels.
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