Risk factors for Salmonella seroconversion of fattening pigs in farrow-to-finish herds Pierre-Alexandre Beloeil, Claire Chauvin, Karine Proux, Christelle Fablet, François Madec and Ahmadou Alioum Vet. Res., 38 6 (2007) 835-848 Published online: 20 September 2007 DOI: 10.1051/vetres:2007034