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Prospects in Salmonella Control: Competitive Exclusion, Probiotics, and Enhancement of Avian Intestinal Immunity

L. Revolledo^*, A. J. P. Ferreira^*,1 and G. C. Mead

^* Department of Pathology, Faculty of Veterinary Medicine, University of Sao Paulo, Av. Prof Orlando Marques de Paiva 87, CEP 05508 – 000, Sao Paulo, SP Brazil; and Royal Veterinary College, Boltons Park, Hawkshead Road, Potters Bar, Herts EN6 1NB, United Kingdom

Correspondence: ¹ Corresponding author: ajpferr{at}usp.br

Salmonella infections are mainly asymptomatic in poultry but are associated with widespread human illness from this source. Therefore, there is continuing interest in finding ways of preventing flock infection and, hence, contamination of poultry products with salmonellas. This review considers aspects of Salmonella carriage in poultry and host interactions that may be exploitable in the future to improve existing control measures. These include factors involved in colonization of the gastrointestinal tract, the role of competitive exclusion and probiotic treatments, and enhancement of intestinal immunity.

Key Words: Salmonella infection • gut colonization • probiotic • competitive exclusion • avian intestinal immunity